Defined benefit pension and other postretirement plans, Income tax effect

1.0

(3.4)

2.4

(1.3)

1.9

(1.5)

Defined benefit pension and other postretirement plans, Net of tax

(10.2)

(61.0)

(17.3)

Other comprehensive loss, net of tax

(127.1)

(63.4)

(109.2)

Total comprehensive income

161.8

401.2

442.3

Less: comprehensive income attributable to noncontrolling interest

17.1

16.8

16.7

Comprehensive Income Attributable to IPG

$ 144.7

$ 384.4

$ 425.6

[1]	1 These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 13 for further information

Consolidated Balance Sheets (USD $)
In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

ASSETS:

Cash and cash equivalents

$ 1,636.8

$ 2,574.8

Marketable securities

5.3

16.0

Accounts receivable, net of allowance of $64.9 and $59.0

4,565.4

4,496.6

Expenditures billable to clients

1,536.4

1,318.8

Other current assets

340.1

332.1

Total current assets

8,084.0

8,738.3

Furniture, equipment and leasehold improvements, net

540.0

504.8

Deferred income taxes

144.0

160.5

Current portion of long-term debt

3,629.0

3,580.6

Other non-current assets

508.0

509.7

TOTAL ASSETS

12,905.0

13,493.9

LIABILITIES:

Accounts payable

6,914.2

6,584.8

Accrued liabilities

718.4

728.2

Short-term borrowings

179.1

172.1

353.6

^[1]

216.6

^[1]

Total current liabilities

8,165.3

7,701.7

Long-term debt

1,129.8

2,060.8

Deferred compensation

514.3

489.0

Other non-current liabilities

595.7

558.6

TOTAL LIABILITIES

10,405.1

10,810.1

Commitments and contingencies (see Note 14)

Redeemable noncontrolling interests (see Note 5)

249.1

227.2

STOCKHOLDERS' EQUITY:

Preferred stock, no par value, shares authorized: 20.0 Series B shares issued and outstanding: 2013 – 0.0; 2012 – 0.2

221.5

Common stock, $0.10 par value, shares authorized: 800.0 shares issued: 2013 – 532.3; 2012 – 492.0 shares outstanding: 2013 – 424.5; 2012 – 417.5

53.0

48.8

Additional paid-in capital

2,975.2

2,465.4

Retained earnings

864.5

738.3

Accumulated other comprehensive loss, net of tax

(411.2)

(288.0)

Stockholders Equity Subtotal Before Treasury Stock

3,481.5

3,186.0

Less: Treasury stock, at cost: 2013 - 107.8 shares; 2012 - 74.6 shares

(1,266.3)

(765.4)

Total IPG stockholders' equity

2,215.2

2,420.6

Noncontrolling interests

35.6

36.0

TOTAL STOCKHOLDERS' EQUITY

2,250.8

2,456.6

TOTAL LIABILITIES AND EQUITY

$ 12,905.0

$ 13,493.9

[1]

We included our 6.25% Senior Unsecured Notes due 2014 (the "6.25% Notes") in the current portion of long-debt on our December 31, 2013 Consolidated Balance Sheet because the 6.25% Notes are scheduled to mature on November 15, 2014. We included our 4.75% Convertible Senior Notes due 2023 (the "4.75% Notes") in the current portion of long-term debt on our December 31, 2012 Consolidated Balance Sheet because holders of the 4.75% Notes had an option to require us to repurchase their Notes for cash, stock, or a combination, at our election, at par on March 15, 2013. The 4.75% Notes were retired in the first quarter of 2013.

(Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 64.9
Preferred stock, no par value	$ 0.00	$ 0.00
Preferred stock, shares authorized	20.0	20.0
Preferred stock, shares issued	0	0.2
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	800.0	800.0
Common stock, shares issued	532.3	492.0
Common stock, shares outstanding	424.5	417.5
Treasury stock, shares	107.8	74.6

Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 288.9	$ 464.6	$ 551.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of fixed assets and intangible assets	157.4	147.7	150.9
Provision for uncollectible receivables	12.6	16.3	10.4
Amortization of restricted stock and other non-cash compensation	43.1	44.5	51.7
Net amortization of bond discounts (premiums) and deferred financing costs	8.6	1.8	(8.7)
Non-cash loss related to early extinguishment of debt	15.2	0	0
Deferred income tax provision	69.4	103.6	83.9
Gain on sale of an investment	0	(93.6)	(132.2)
Other	3.2	12.3	28.2
Changes in assets and liabilities, net of acquisitions and dispositions, providing cash
Accounts receivable	(157.1)	(44.7)	(219.2)
Expenditures billable to clients	(241.5)	(73.8)	(39.2)
Other current assets	(11.3)	3.5	(42.0)
Accounts payable	417.7	(120.4)	(62.9)
Accrued liabilities	(17.4)	(57.8)	3.9
Other non-current assets and liabilities	(4.1)	46.8	102.8
Net cash provided by operating activities	592.9	357.2	273.5
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(173.0)	(169.2)	(140.3)
Acquisitions, including deferred payments, net of cash acquired	(61.5)	(145.5)	(63.1)
Proceeds from the sale of an investment	0	94.8	133.5
Other investing activities	10.0	9.7	11.1
Net cash used in investing activities	(224.5)	(210.2)	(58.8)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of long-term debt	(602.4)	(401.5)	(38.9)
Proceeds from issuance of long-term debt	0	1,044.6	0
Repurchase of common stock	(481.8)	(350.5)	(400.8)
Common stock dividends	(126.0)	(103.4)	(111.1)
Exercise of stock options	47.4	10.8	12.0
Acquisition-related payments	(27.6)	(37.1)	(71.5)
Net increase in short term bank borrowings	5.4	12.6	42.5
Distributions to noncontrolling interests	(14.9)	(17.0)	(23.0)
Preferred stock dividends	(11.6)	(11.6)	(11.6)
Excess tax benefit on share-based compensation	0	15.0	8.4
Other financing activities	(0.8)	(30.6)	53.0
Net cash (used in) provided by financing activities	(1,212.3)	131.3	(541.0)
Effect of foreign exchange rate changes on cash and cash equivalents	(94.1)	(6.2)	(46.7)
Net (decrease) increase in cash and cash equivalents	(938.0)	272.1	(373.0)
Cash and cash equivalents at beginning of period	2,574.8	2,302.7	2,675.7
Cash and cash equivalents at end of period	$ 1,636.8	$ 2,574.8	$ 2,302.7

Consolidated Statements of Stockholders' Equity (USD $) In Millions	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss, Net of Tax	Treasury Stock	Total IPG Stockholders' Equity	Noncontrolling Interests
Beginning balance at Dec. 31, 2010	$ 2,566.9	$ 221.5	$ 47.5	$ 2,456.8	$ (63.7)	$ (119.0)	$ (14.1)	$ 2,529.0	$ 37.9
Beginning balance, shares at Dec. 31, 2010			489.5
Net income	551.5				532.3			532.3	19.2
Other comprehensive loss	(109.2)					(106.7)		(106.7)	(2.5)
Noncontrolling interest transactions	(1.6)			0.4	0.6			1.0	(2.6)
Distributions to noncontrolling interests	(23.0)								(23.0)
Change in redemption value of redeemable noncontrolling interests	(14.1)			(10.6)	(3.5)			(14.1)
Repurchase of common stock	(400.8)						(400.8)	(400.8)
Common stock dividends	(111.1)			(56.8)	(54.3)			(111.1)
Preferred stock dividends	(11.6)			(5.8)	(5.8)			(11.6)
Stock-based compensation, shares			1.5
Share-based Compensation	51.7
Stock-based compensation, value	48.7		0.8	47.9				48.7
Exercise of stock options, shares	1.3		1.3
Exercise of stock options, value	12.0		0.1	11.9				12.0
Reclassifications related to redeemable noncontrolling interests	10.4			2.7				2.7	7.7
Shares withheld for taxes, shares			(0.9)
Shares withheld for taxes, value	(27.0)		(0.2)	(26.8)				(27.0)
Operating Income (Loss)	687.2
Loss on Extinguishment of Debt	0
Restructuring and other reorganization-related charges (reversals), net	1.0
Tax effect from stock-based compensation	8.4			8.4				8.4
Other	(2.2)			(0.6)	(0.5)			(1.1)	(1.1)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	(0.1)
Ending balance at Dec. 31, 2011	2,497.3	221.5	48.2	2,427.5	405.1	(225.7)	(414.9)	2,461.7	35.6
Ending balance, shares at Dec. 31, 2011			491.4
Net income	464.6				446.7			446.7	17.9
Other comprehensive loss	(63.4)					(62.3)		(62.3)	(1.1)
Noncontrolling interest transactions	(2.2)								(2.2)
Distributions to noncontrolling interests	(17.0)								(17.0)
Change in redemption value of redeemable noncontrolling interests	2.7				2.7			2.7
Repurchase of common stock	(350.5)						(350.5)	(350.5)
Common stock dividends	(103.4)				(103.4)			(103.4)
Preferred stock dividends	(11.6)				(11.6)			(11.6)
Stock-based compensation, shares			1.6
Share-based Compensation	44.5
Stock-based compensation, value	32.0		0.7	31.3				32.0
Exercise of stock options, shares	1.2		1.1
Exercise of stock options, value	10.9		0.1	10.8				10.9
Reclassifications related to redeemable noncontrolling interests	10.9			12.0				12.0	(1.1)
Shares withheld for taxes, shares			(2.1)
Shares withheld for taxes, value	(23.7)		(0.2)	(23.5)				(23.7)
Operating Income (Loss)	678.3
Loss on Extinguishment of Debt	0
Restructuring and other reorganization-related charges (reversals), net	(1.2)
Tax effect from stock-based compensation	14.8			14.8				14.8
Other	(4.8)			(7.5)	(1.2)			(8.7)	3.9
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	0.4
Ending balance at Dec. 31, 2012	2,456.6	221.5	48.8	2,465.4	738.3	(288.0)	(765.4)	2,420.6	36.0
Ending balance, shares at Dec. 31, 2012			492.0
Net income	288.9				267.9			267.9	21.0
Other comprehensive loss	(127.1)					(123.2)		(123.2)	(3.9)
Noncontrolling interest transactions	1.0			(0.1)				(0.1)	1.1
Distributions to noncontrolling interests	(14.9)								(14.9)
Change in redemption value of redeemable noncontrolling interests	(6.2)				(6.2)			(6.2)
Repurchase of common stock	(481.8)						(481.8)	(481.8)
Common stock dividends	(126.0)				(126.0)			(126.0)
Preferred stock dividends	(8.7)				(8.7)			(8.7)
Conversion of convertible notes to common stock, shares	17.3		16.9
Conversion of convertible notes to common stock, value	200.0		1.7	198.3				200.0
Capped call transaction	0			19.1			(19.1)	0
Conversion of preferred stock to common stock		(221.5)
Conversion of preferred stock to common stock, shares			17.3
Conversion of preferred stock to common stock, value	0		1.7	219.8				0
Stock-based compensation, shares			2.4
Share-based Compensation	43.1		0.5
Stock-based compensation, value	43.6			43.1				43.6
Exercise of stock options, shares	5.2		5.2
Exercise of stock options, value	47.9		0.5	47.4				47.9
Reclassifications related to redeemable noncontrolling interests	(4.4)			0.2					(4.6)
Shares withheld for taxes, shares			(1.5)
Shares withheld for taxes, value	(20.1)		(0.2)	(19.9)				(20.1)
Operating Income (Loss)	598.3
Loss on Extinguishment of Debt	(45.2)
Restructuring and other reorganization-related charges (reversals), net	60.6
Other	2.0			1.9	(0.8)			1.1	0.9
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	0.8
Ending balance at Dec. 31, 2013	$ 2,250.8	$ 0	$ 53.0	$ 2,975.2	$ 864.5	$ (411.2)	$ (1,266.3)	$ 2,215.2	$ 35.6
Ending balance, shares at Dec. 31, 2013			532.3

Summary of Significant Accounting Policies (Notes)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Business Description

The Interpublic Group of Companies, Inc. and subsidiaries (the “Company,” “IPG,” “we,” “us” or “our”) is one of the world’s premier global advertising and marketing services companies. Our agencies create customized marketing programs for clients that range in scale from large global marketers to regional and local clients. Comprehensive global services are critical to effectively serve our multinational and local clients in markets throughout the world, as they seek to build brands, increase sales of their products and services and gain market share in an increasingly complex and fragmented media landscape.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are accounted for under the cost method. All intercompany accounts and transactions have been eliminated in consolidation.

We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

Reclassifications

Certain reclassifications have been made to the prior period financial statements to conform to the current-year presentation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates and assumptions.

Revenue Recognition

Our revenues are primarily derived from the planning and execution of multi-channel advertising, marketing and communications programs around the world. Our revenues are directly dependent upon the advertising, marketing and corporate communications requirements of our existing clients and our ability to win new clients. Our revenue is typically lowest in the first quarter and highest in the fourth quarter. This reflects the seasonal spending of our clients, incentives earned at year end on various contracts and project work completed that is typically recognized during the fourth quarter.

Most of our client contracts are individually negotiated and, accordingly, the terms of client engagements and the bases on which we earn commissions and fees vary significantly. As is customary in the industry, our contracts generally provide for termination by either party on relatively short notice, usually 90 days.

Our client contracts are complex arrangements that may include provisions for incentive compensation and vendor rebates and credits. Our largest clients are multinational entities and, as such, we often provide services to these clients out of multiple offices and across many of our agencies. In arranging for such services, it is possible that we will enter into global, regional and local agreements. Agreements of this nature are reviewed by legal counsel to determine the governing terms to be followed by the offices and agencies involved.

Revenue for our services is recognized when all of the following criteria are satisfied: (i) persuasive evidence of an arrangement exists; (ii) the price is fixed or determinable; (iii) collectability is reasonably assured; and (iv) services have been performed. Depending on the terms of a client contract, fees for services performed can be recognized in three principal ways: proportional performance (input or output), straight-line (or monthly basis) or completed contract.

•

Fees are generally recognized as earned based on the proportional performance input method of revenue recognition in situations where our fee is reconcilable to the actual hours incurred to service the client as detailed in a contractual staffing plan, where the fee is earned on a per hour basis or where actual hours incurred are provided to the client on a periodic basis (whether or not the fee is reconcilable), with the amount of revenue recognized in these situations limited to the amount realizable under the client contract. We believe an input-based measure (the ‘hour’) is appropriate in situations where the client arrangement essentially functions as a time and out-of-pocket expense contract and the client receives the benefit of the services provided throughout the contract term.


•	Fees are recognized on a straight-line or monthly basis when service is provided essentially on a pro-rata basis and the terms of the contract support monthly basis accounting.

•

Certain fees (such as for major marketing events) are deferred until contract completion if the final act is so significant in relation to the service transaction taken as a whole or if any of the terms of the contract do not otherwise qualify for proportional performance or monthly basis recognition. Fees may also be deferred and recognized upon delivery of a project if the terms of the client contract identify individual discrete projects.

Depending on the terms of the client contract, revenue is derived from diverse arrangements involving fees for services performed, commissions, performance incentive provisions and combinations of the three. Commissions are generally earned on the date of the broadcast or publication. Contractual arrangements with clients may also include performance incentive provisions designed to link a portion of our revenue to our performance relative to either qualitative or quantitative goals, or both. Performance incentives are recognized as revenue for quantitative targets when the target has been achieved and for qualitative targets when confirmation of the incentive is received from the client.

The majority of our revenue is recorded as the net amount of our gross billings less pass-through expenses charged to a client. In most cases, the amount that is billed to clients significantly exceeds the amount of revenue that is earned and reflected in our Consolidated Financial Statements because of various pass-through expenses, such as production and media costs. We assess whether our agency or the third-party supplier is the primary obligor, and we evaluate the terms of our client agreements as part of this assessment. In addition, we give appropriate consideration to other key indicators such as latitude in establishing price, discretion in supplier selection and credit risk to the vendor. Because we operate broadly as an advertising agency, based on our primary lines of business and given the industry practice to generally record revenue on a net versus gross basis, we believe that there must be strong evidence in place to overcome the presumption of net revenue accounting. Accordingly, we generally record revenue net of pass-through charges as we believe the key indicators of the business suggest we generally act as an agent on behalf of our clients in our primary lines of business. In those businesses where the key indicators suggest we act as a principal (primarily sales promotion and event, sports and entertainment marketing), we record the gross amount billed to the client as revenue and the related incremental direct costs incurred as office and general expenses. In general, we also report revenue net of taxes assessed by governmental authorities that are directly imposed on our revenue-producing transactions.

As we provide services as part of our core operations, we generally incur incidental expenses, which, in practice, are commonly referred to as “out-of-pocket” expenses. These expenses often include expenses related to airfare, mileage, hotel stays, out-of-town meals and telecommunication charges. We record the reimbursements received for such incidental expenses as revenue with a corresponding offset to office and general expense.

We receive credits from our vendors and media outlets for transactions entered into on behalf of our clients that, based on the terms of our contracts and local law, are either remitted to our clients or retained by us. If amounts are to be passed through to clients, they are recorded as liabilities until settlement or, if retained by us, are recorded as revenue when earned.

Cash and Cash Equivalents

Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

Short-Term Marketable Securities

Short-term marketable securities include investment-grade time deposits, commercial paper and government securities with maturities greater than three months but less than twelve months. These securities are classified as available-for-sale and are carried at fair value with net unrealized gains and losses reported as a component of accumulated other comprehensive loss, which is a component of stockholders’ equity. The cost of securities is determined based upon the average cost of the securities sold.

Allowance for Doubtful Accounts

The allowance for doubtful accounts is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

Expenditures Billable to Clients

Expenditures billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in expenditures billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

Accounts Payable

Accounts payable includes all operating payables, including those related to all media and production costs. These payables are due within one year.

Investments

Our investments in publicly traded companies over which we do not exert a significant influence are classified as available-for-sale. These investments are reported at fair value based on quoted market prices with net unrealized gains and losses reported as a component of accumulated other comprehensive loss. Our non-publicly traded investments and all other publicly traded investments, including investments to fund certain deferred compensation and retirement obligations, are accounted for using the equity method or cost method. We do not disclose the fair value for equity method investments or investments held at cost as it is not practical to estimate fair value since there is no readily available market data and it is cost prohibitive to obtain independent valuations. We regularly review our equity and cost method investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment. In the event a decline in fair value of an investment occurs, we determine if the decline has been other-than-temporary. We consider our investments strategic and long-term in nature, so we determine if the fair value decline is recoverable within a reasonable period. For our investments, we evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if an other-than-temporary decline in value of an investment has occurred.

Derivatives

We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the effective portion of the changes in the fair value of the derivative is recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings.

Furniture, Equipment and Leasehold Improvements

Furniture, equipment and leasehold improvements are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture, equipment and computer software costs, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements.

Goodwill and Other Intangible Assets

We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

We review goodwill and other intangible assets with indefinite lives not subject to amortization as of October 1^st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 13 reporting units that were subject to the 2013 annual impairment testing. Our annual impairment review as of October 1, 2013 did not result in an impairment charge for any of our reporting units.

During 2011 and 2012, we adopted new authoritative guidance for goodwill and indefinite-lived intangible assets, respectively, which permits an entity to first assess qualitative factors to determine whether it is “more likely than not” that the goodwill or indefinite-lived intangible assets are impaired. Qualitative factors to consider may include macroeconomic conditions, industry and market considerations, cost factors that may have a negative effect on earnings, financial performance, and other relevant entity-specific events such as changes in management, key personnel, strategy or clients, as well as pending litigation. If, after assessing the totality of events or circumstances such as those described above, an entity determines that it is "more likely than not" that the goodwill or indefinite-lived intangible asset is impaired, then the entity is required to determine the fair value and perform the quantitative impairment test by comparing the fair value with the carrying value. Otherwise, no additional testing is required.

For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the first step of the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The first step is a comparison of the fair value of each reporting unit to its carrying value, including goodwill. The sum of the fair values of all our reporting units is reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the first step of the quantitative impairment test is failed and the magnitude of any goodwill impairment is determined under the second step, which is a comparison of the implied fair value of a reporting unit's goodwill to its carrying value. The implied fair value of goodwill is the excess of the fair value of the reporting unit over its carrying value, excluding goodwill. Impaired goodwill is written down to its implied fair value with a charge to expense in the period the impairment is identified.

The fair value of a reporting unit for 2013 and 2012 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data.

We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these assets. These assets are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

Foreign Currencies

The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax loss of $0.6 in 2013 , a pre-tax gain of $1.2 in 2012 and a pre-tax loss $0.9 in 2011.

We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country would be changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses would be recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

Income Taxes

The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Redeemable Noncontrolling Interests

Many of our acquisitions include provisions under which the noncontrolling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable noncontrolling interests are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress. We record these redeemable noncontrolling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable noncontrolling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings or additional paid-in capital, but will not impact net income. Adjustments as a result of currency translation will affect the redeemable noncontrolling interest balance, but do not impact retained earnings or additional paid-in capital.

Earnings Per Share (“EPS”)

Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders adjusted to exclude, if dilutive, preferred stock dividends, interest expense related to potentially dilutive securities calculated using the effective interest rate method and the benefit from the preferred stock repurchased, divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued.

Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities or debt obligations were exercised or converted into common stock. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock or “if-converted” method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized and any tax benefits credited to additional paid-in-capital related to the exercise. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation.

We may be required to calculate basic EPS using the two-class method, as a result of our redeemable noncontrolling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable noncontrolling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2013, 2012 and 2011, there was no impact to EPS for adjustments related to our redeemable noncontrolling interests.

Pension and Postretirement Benefits

We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

Stock-Based Compensation

Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

Debt and Credit Arrangements

The entire disclosure for all significant accounting policies of the reporting entity.

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Debt and Credit Arrangements (Notes)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Long-Term Debt

A summary of the carrying amounts and fair values of our debt is listed below.



	Effective Interest Rate		December 31,
			2013				2012
			Book Value		Fair Value ¹		Book Value		Fair Value
6.25% Senior Unsecured Notes due 2014 (less unamortized discount of $0.1)	6.29	%	$	351.3	$	365.6	$	352.8	$	372.6
2.25% Senior Notes due 2017 (less unamortized discount of $0.6)	2.30	%	299.4		293.0		299.3		297.8
4.00% Senior Notes due 2022 (less unamortized discount of $2.6)	4.13	%	247.4		241.6		247.1		258.7
3.75% Senior Notes due 2023 (less unamortized discount of $1.4)	4.32	%	498.6		467.3		498.5		499.7
10.00% Senior Unsecured Notes due 2017			0.0		0.0		591.9		660.8
4.75% Convertible Senior Notes due 2023			0.0		0.0		200.5		202.8
Other notes payable and capitalized leases			86.7		87.8		87.3		90.8
Total long-term debt			1,483.4				2,277.4
Less: current portion ²			353.6				216.6
Long-term debt, excluding current portion			$	1,129.8			$	2,060.8


¹	See Note 12 for information on the fair value measurement of our long-term debt.

Annual maturities are scheduled as follows based on the book value as of December 31, 2013.



2014	$	353.6
2015	2.2
2016	2.3
2017	301.7
2018	24.8
Thereafter	798.8
Total long-term debt	$	1,483.4

For those debt securities that have a premium or discount at the time of issuance, we amortize the amount through interest expense based on the maturity date or the first date the holders may require us to repurchase the debt securities, if applicable. A premium would result in a decrease in interest expense and a discount would result in an increase in interest expense in future periods. We also have recorded debt issuance costs related to certain financing transactions in other assets in our Consolidated Balance Sheets, which are also amortized through interest expense. As of December 31, 2013 and 2012, we had unamortized debt issuance costs of $15.4 and $27.5, respectively.

Our debt securities include covenants that, among other things, limit our liens and the liens of certain of our consolidated subsidiaries, but do not require us to maintain any financial ratios or specified levels of net worth or liquidity.

Debt Transactions

10.00% Senior Unsecured Notes due 2017

In July 2013, we redeemed all $600.0 in aggregate principal amount of the 10.00% Senior Unsecured Notes due 2017 (the "10.00% Notes"). Total cash paid to redeem the 10.00% Notes was $630.0. In connection with the redemption of the 10.00% Notes, we recognized a loss on early extinguishment of debt of $45.2, which included a redemption premium of $30.0, the write-off of the remaining unamortized discount of $7.3 and unamortized debt issuance costs of $7.9. The loss on early extinguishment of debt was recorded in other (expense) income, net within our Consolidated Statement of Operations.

4.75% Convertible Senior Notes due 2023

In March 2013, we retired all $200.0 in aggregate principal amount of our 4.75% Notes. Of the amount retired, $199.997 in aggregate principal amount of the 4.75% Notes was converted, at the election of the holders, into Interpublic common stock at a conversion rate of 84.3402 shares (actual number) per $1,000 (actual number) principal amount, or approximately 16.9 shares.

In November 2010, we purchased capped call options to hedge the risk of price appreciation on the shares of our common stock into which our 4.75% Notes are convertible. In March 2013, we exercised our capped call options and elected net share settlement. We received a total of 1.5 settlement shares from the option counterparties as a result of exercising these options.

2.25% Senior Notes due 2017

In November 2012, we issued $300.0 in aggregate principal amount of 2.25% Senior Notes due 2017 (the "2.25% Notes") at a discount to par. As a result, the 2.25% Notes were reflected on our Consolidated Balance Sheet at a fair value of $299.3 at issuance. The discount of $0.7 and capitalized issuance fees of $2.1 are amortized in interest expense through the maturity date of November 15, 2017. Interest is payable semi-annually in arrears on May 15^th and November 15^th of each year.

3.75% Senior Notes due 2023

In November 2012, we issued $500.0 in aggregate principal amount of 3.75% Senior Notes due 2023 (the "3.75% Notes") at a discount to par. As a result, the 3.75% Notes were reflected on our Consolidated Balance Sheet at a fair value of $498.5 at issuance. The discount of $1.5 and capitalized issuance fees of $3.8 are amortized in interest expense through the maturity date of February 15, 2023. Interest is payable semi-annually in arrears on February 15^th and August 15^th of each year.

We applied the proceeds of the 2.25% Notes and 3.75% Notes towards the repurchase and redemption of the 10.00% Notes and the repurchase of common stock into which the 4.75% Notes were converted.

4.00% Senior Notes due 2022

In March 2012, we issued $250.0 in aggregate principal amount of 4.00% Senior Notes due 2022 (the "4.00% Notes") at a discount to par. As a result, the 4.00% Notes were reflected on our Consolidated Balance Sheet at a fair value of $246.8 at issuance. The discount of $3.2 and capitalized issuance fees of $2.5 are amortized through the maturity date of March 15, 2022. Interest is payable semi-annually in arrears on March 15^th and September 15^th of each year. We applied the net proceeds towards the repurchase and redemption of our 4.25% Convertible Senior Notes due 2023 (the "4.25% Notes").

4.25% Convertible Senior Notes due 2023

In March 2012, we retired $400.0 in aggregate principal amount of our 4.25% Notes. Of the amount retired, $399.6 in aggregate principal amount was redeemed or repurchased for cash at par plus accrued interest of $0.5. The remaining $0.4 in aggregate principal amount was converted at the election of the 4.25% Note holders into Interpublic common stock at a conversion rate of 82.4612 shares (actual number) per $1,000 (actual number) principal amount of the 4.25% Notes, or approximately 30,000 shares (actual number). The retirement of our 4.25% Notes eliminated approximately 33.0 shares of common stock from our eligible diluted share count annually.

At any time, at our option, we may redeem all or some of the 2.25% Notes, the 3.75% Notes and the 4.00% Notes at the greater of the principal amount of the notes to be redeemed or a "make-whole" amount, plus, in either case, accrued and unpaid interest to the date of redemption. If we experience a change of control event, coupled with a specified downgrade in the credit rating of the applicable series, we must offer to repurchase each series of these notes in cash at a price equal to not less than 101% of the aggregate principal amount of such notes, plus accrued and unpaid interest to the date of repurchase.

Interest Rate Swaps

We enter into interest rate swaps to manage our exposure to changes in interest rates. In March and April of 2012, we entered into forward-starting interest rate swap agreements with an aggregate notional amount of $300.0 to effectively lock in the benchmark rate for a forecasted issuance of debt to occur prior to December 31, 2013. These swaps qualified for hedge accounting as cash flow hedges, and, as such, the effective portion of the losses on the swaps was recorded in other comprehensive income and the ineffective portion of the losses on the swaps was recorded in other income, net. In November 2012, we terminated these swaps when we issued our 3.75% Notes. We paid $24.0 in cash to settle the swaps, which was classified under the financing section of our Consolidated Statements of Cash Flows, and recognized a charge of $2.1, which was included as a component of other (expense) income, net in our Consolidated Statement of Operations. The deferred losses on the swaps of $21.9 are being amortized as an increase to interest expense over the term of the 3.75% Notes.

For the year ended December 31, 2013, we reclassified $1.7 from accumulated other comprehensive loss into interest expense. Within the next twelve months, we expect to reclassify approximately $1.8 from accumulated other comprehensive loss into interest expense in our Consolidated Statement of Operations.

Credit Agreements

We maintain a committed corporate credit facility and uncommitted credit facilities with various banks that permit borrowings at variable interest rates. As of December 31, 2013 and 2012, there were no borrowings under our committed corporate credit facility. However, there were borrowings under some of the uncommitted facilities. We have guaranteed the repayment of some of these borrowings made by certain subsidiaries. The weighted-average interest rate on outstanding balances under the uncommitted credit facilities as of December 31, 2013 and 2012 was approximately 4.0%.

A summary of our credit facilities is presented below.



	December 31,
	2013								2012
	Total Facility		Amount Outstanding		Letters of Credit		Total Available		Total Facility		Amount Outstanding		Letters of Credit		Total Available
Committed credit agreement	$	1,000.0	$	0.0	$	14.3	$	985.7	$	1,000.0	$	0.0	$	15.1	$	984.9
Uncommitted credit agreements	$	700.2	$	179.1	$	4.2	$	516.9	$	317.2	$	172.1	$	3.3	$	141.8

In December 2013, we amended and restated our credit agreement, originally dated as of July 18, 2008 (as amended and restated as of December 12, 2013, the "Credit Agreement"). The amendment extends the Credit Agreement's expiration to December 12, 2018, reduced costs and provides additional flexibility with respect to certain covenants such as restrictions on acquisitions, liens, and subsidiary debt. The Credit Agreement is a revolving facility, under which amounts borrowed by us or any of our subsidiaries designated under the Credit Agreement may be repaid and reborrowed, subject to an aggregate lending limit of $1,000.0 or the equivalent in other currencies. The Company continues to have the ability to increase the commitments under the Credit Agreement from time to time by an additional amount of up to $250.0, provided the Company receives commitments for such increases and satisfies certain other conditions. The aggregate available amount of letters of credit outstanding may decrease or increase, subject to a sublimit on letters of credit of $200.0 or the equivalent in other currencies. Our obligations under the Credit Agreement are unsecured.

Under the Credit Agreement, we can elect to receive advances bearing interest based on either the base rate or the Eurocurrency rate (each as defined in the Credit Agreement) plus an applicable margin that is determined based on our credit ratings. As of December 31, 2013, the applicable margin is 0.275% for base rate advances and 1.275% for Eurocurrency rate advances. Letter of credit fees accrue on the average daily aggregate amount of letters of credit outstanding, at a rate equal to the applicable margin for Eurocurrency rate advances, and fronting fees accrue on the aggregate amount of letters of credit outstanding at an annual rate of 0.250%. We also pay a facility fee at an annual rate of 0.225% on the aggregate lending commitment under the Credit Agreement.

We were in compliance with all of our covenants in the Credit Agreement as of December 31, 2013. The financial covenants in the Credit Agreement require that we maintain the following financial covenants listed below as of December 31, 2013 and thereafter.



Interest coverage ratio (not less than): ¹		5.00x
Leverage ratio (not greater than): ²		3.25x


¹	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.


²	The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Cash Pooling

We aggregate our domestic cash position on a daily basis. Outside the United States we use cash pooling arrangements with banks to help manage our liquidity requirements. In these pooling arrangements, several IPG agencies agree with a single bank that the cash balances of any of the agencies with the bank will be subject to a full right of set-off against amounts the other agencies owe the bank, and the bank provides for overdrafts as long as the net balance for all the agencies does not exceed an agreed-upon level. Typically, each agency pays interest on outstanding overdrafts and receives interest on cash balances. Our Consolidated Balance Sheets reflect cash, net of bank overdrafts, under all of our pooling arrangements, and as of December 31, 2013 and 2012 the amounts netted were $1,415.3 and $1,166.3, respectively.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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Convertible Preferred Stock	12 Months Ended
Convertible Preferred Stock	Dec. 31, 2013
Features of Convertible Preferred Stock [Abstract]
Preferred Stock	Convertible Preferred Stock Each share of our 5¹/4% Series B Cumulative Convertible Perpetual Preferred Stock (the “Series B Preferred Stock”) had a liquidation preference of $1,000 per share and was convertible at the option of the holder at any time into shares of our common stock. In addition, the Series B Preferred Stock was convertible at our option if the closing price of our common stock multiplied by the conversion rate in effect at that time equaled or exceeded 130% of the liquidation preference for 20 trading days during any consecutive 30 trading day period. On October 17, 2013, we exercised our option to convert all of our outstanding shares of our Series B Preferred Stock. Prior to the conversion, there were 221,474 shares (actual number) outstanding. Each share of Series B Preferred Stock converted into common shares at a conversation rate of 77.8966 common shares per preferred share, or approximately 17.3 common shares. The company also paid a nominal cash amount in lieu of fractional shares. The shares of Series B Preferred Stock were previously included as eligible dilutive securities in our calculation of diluted share count, and the approximately 17.3 newly issued common shares will now be included in our basic share count. During 2013 and 2012, we paid annual dividends of $11.6, or $52.50 per share, on our Series B Preferred Stock. Dividends were paid in January 15, April 15, July 15, and October 15, 2013.

Earnings Per Share (Notes)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Share

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.



	Years ended December 31,
	2013		2012		2011
Net income available to IPG common stockholders - basic	$	259.2	$	435.1	$	520.7
Adjustments: Effect of dilutive securities
Interest on 4.25% Notes ¹	0.0		0.3		1.4
Interest on 4.75% Notes ¹	0.8		4.1		4.1
Dividends on preferred stock	0.0		11.6		11.6
Net income available to IPG common stockholders - diluted	$	260.0	$	451.1	$	537.8


Weighted-average number of common shares outstanding - basic	421.1		432.5		465.5
Add: Effect of dilutive securities
Restricted stock, stock options and other equity awards	5.2		7.2		9.1
4.25% Notes ¹	0.0		7.9		33.0
4.75% Notes ¹	3.3		16.9		16.5
Preferred stock outstanding ²	0.0		16.9		16.5

Weighted-average number of common shares outstanding - diluted	429.6		481.4		540.6


Earnings per share available to IPG common stockholders - basic	$	0.62	$	1.01	$	1.12
Earnings per share available to IPG common stockholders - diluted	$	0.61	$	0.94	$	0.99


¹	We retired all of our outstanding 4.75% Notes and 4.25% Notes in March 2013 and March 2012, respectively. See Note 2 for further information. For purposes of calculating diluted earnings per share for 2013 and 2012, the potentially dilutive shares are pro-rated based on the period they were outstanding.


²	We converted all of our Series B Preferred Stock into common stock in October 2013. See Note 3 for further information. For purposes of calculating diluted earnings per share for 2013, the potentially dilutive shares would have been pro-rated based on the period they were outstanding but were antidilutive.

The following table presents the potential shares excluded from the diluted earnings per share calculation because the effect of including these potential shares would be antidilutive.



	Years ended December 31,
	2013	2012	2011
Preferred Stock Outstanding ¹	13.7	0.0	0.0
Securities excluded from the diluted earnings per share calculation because the exercise price was greater than the average market price:
Stock options ²	0.1	6.6	8.9


¹	We converted all of our Series B Preferred Stock into common stock in October 2013. See Note 3 for further information. For purposes of calculating diluted earnings per share for 2013, the potentially dilutive shares would have been pro-rated based on the period they were outstanding but were antidilutive.


²	These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

The entire disclosure for earnings per share.

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Acquisitions (Notes)

12 Months Ended

Dec. 31, 2013

Business Combinations [Abstract]

Acquisitions

We continue to evaluate strategic opportunities to expand our industry expertise, strengthen our position in high-growth and key strategic geographical markets and industry sectors, advance technological capabilities and improve operational efficiency through both acquisitions and increased ownership interests in current investments. Our acquisitions typically provide for an initial payment at the time of closing and additional contingent purchase price payments based on the future performance of the acquired entity. We have entered into agreements that may require us to purchase additional equity interests in certain consolidated and unconsolidated subsidiaries. The amounts at which we record these transactions in our financial statements are based on estimates of the future financial performance of the acquired entity, the timing of the exercise of these rights, changes in foreign currency exchange rates and other factors.

For companies acquired, we estimate the fair values of the assets and liabilities based on 100% of the business for consolidation. The purchase price in excess of the estimated fair value of the tangible net assets acquired is allocated to identifiable intangible assets and then to goodwill. Due to the characteristics of advertising, specialized marketing and communication services companies, our acquisitions typically do not have significant amounts of tangible assets since the principal assets we acquire are client relationships and talent. As a result, a substantial portion of the purchase price is primarily allocated to customer lists, trade names and goodwill.

For acquisitions we record deferred payment and redeemable noncontrolling interest amounts on our Consolidated Balance Sheets based on their acquisition-date fair value. Deferred payments are recorded on a discounted basis and adjusted quarterly, if necessary, through operating income or net interest expense, depending on the nature of the arrangement, for both changes in estimate and accretion between the acquisition date and the final payment date. See Note 15 for further information on contingent acquisition obligations. Redeemable noncontrolling interests are adjusted quarterly to their estimated redemption value, but not less than their initial fair value. Any adjustments to the redemption value impacts retained earnings or additional paid-in capital, except for foreign currency translation adjustments. The following table presents changes in our redeemable noncontrolling interests.



	Years ended December 31,
	2013			2012			2011
Balance at beginning of period	$	227.2		$	243.4		$	291.2
Change in related noncontrolling interest balance	4.6			1.1			(7.7		)
Changes in redemption value of redeemable noncontrolling interests:
Additions	16.2			0.0			17.9
Redemptions and reclassifications	(2.3		)	(14.2		)	(70.7		)
Redemption value adjustments	3.4			(3.1		)	12.7
Balance at end of period	$	249.1		$	227.2		$	243.4

For all acquisitions, if a portion of the deferred payments and purchases of additional interests after the effective date of purchase are contingent upon employment terms, then that amount is accounted separately from the business combination and recognized as compensation expense over the required earn-out period. Payments deemed as compensation are excluded from the fair value purchase price allocation to tangible net assets and intangible assets acquired.

During 2013, we completed eleven acquisitions, nine of which were included in the Integrated Agency Networks ("IAN") operating segment and two of which were included in the Constituency Management Group ("CMG") operating segment. All acquired agencies have been integrated into one of our global networks or existing agencies. The most significant acquisitions included a full service digital agency in India, a full service agency in the U.K. and a public relations consultancy in India. During 2013, we recorded approximately $97.0 of goodwill and intangible assets related to these acquisitions.

During 2012, we completed twelve acquisitions, eight of which were included in the IAN operating segment and four of which were included in the CMG operating segment. All acquired agencies have been integrated into one of our global networks or existing agencies. The most significant acquisitions included a healthcare market research and consulting agency and a search marketing agency in the United Kingdom, and, in the United States, a digital healthcare-marketing specialist and a designer of in-store shopping experiences. During 2012, we recorded approximately $201.0 of goodwill and intangible assets related to these acquisitions.

During 2011, we completed twenty-two acquisitions, which included purchases of controlling interests in previously unconsolidated subsidiaries. Of these acquisitions, eighteen were included in the IAN operating segment and four were included in the CMG operating segment. The most significant acquisitions included full service creative agencies in Australia, a public relations firm in Brazil, digital and direct marketing agencies in the United Kingdom, a healthcare communications firm in Germany and a social media agency in the United States. During 2011, we recorded approximately $133.0 of goodwill and intangible assets related to these acquisitions.

The results of operations of our acquired companies were included in our consolidated results from the closing date of each acquisition. We did not make any payments in stock related to our acquisitions in 2013, 2012 or 2011.

Details of cash paid for current and prior years' acquisitions are listed below.



	Years ended December 31,
	2013			2012			2011
Cost of investment: current-year acquisitions	$	67.7		$	156.8		$	48.0
Cost of investment: prior-year acquisitions	28.5			40.6			105.1
Less: net cash acquired	(7.1		)	(14.8		)	(18.5		)
Total cost of investment ¹	89.1			182.6			134.6
Operating expense²	2.0			3.2			0.5

Total cash paid for acquisitions	$	91.1		$	185.8		$	135.1

Of the total cash paid, $27.6, $37.1 and $71.5 for the years ended December 31, 2013, 2012 and 2011, respectively, are classified under the financing section of the Consolidated Statements of Cash Flows within acquisition-related payments. These amounts relate to increases in our ownership interests in our consolidated subsidiaries as well as deferred payments for acquisitions that closed on or after January 1, 2009. Of the total cash paid, $61.5, $145.5 and $63.1 for the years ended December 31, 2013, 2012 and 2011, respectively, are classified under the investing section of the Consolidated Statements of Cash Flows within acquisitions, including deferred payments, net of cash acquired. These amounts relate to initial payments for new transactions and deferred payments for acquisitions that closed prior to January 1, 2009.


²	Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

Goodwill and Intangible Assets Disclosure [Abstract]

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+ Details

Supplementary Data (Notes)

12 Months Ended

Dec. 31, 2013

Supplementary Data [Abstract]

Supplementary Data

Valuation and Qualifying Accounts – Allowance for Uncollectible Accounts Receivable



	Years ended December 31,
	2013			2012			2011
Balance at beginning of period	$	59.0		$	55.4		$	63.1
Charges to costs and expenses	12.6			16.3			10.4
Reversals to other accounts¹	0.7			(0.2		)	(0.5		)
Deductions:
Dispositions	0.0			(0.4		)	0.0
Uncollectible accounts written off	(7.2		)	(12.6		)	(16.3		)
Foreign currency translation adjustment	(0.2		)	0.5			(1.3		)
Balance at end of period	$	64.9		$	59.0		$	55.4


¹	Amounts primarily relate to miscellaneous other amounts and reclassifications.

Furniture, Equipment and Leasehold Improvements, net



	December 31,
	2013			2012
Furniture and equipment	$	930.7		$	932.6
Leasehold improvements	611.4			597.2
Land and buildings	109.6			109.9
	1,651.7			1,639.7
Less: accumulated depreciation	(1,111.7		)	(1,134.9		)
Total furniture, equipment and leasehold improvements, net	$	540.0		$	504.8

The total depreciation and amortization expense for the years ended December 31, 2013, 2012 and 2011 was $130.6, $124.3 and $130.7, respectively.

Accrued Liabilities

The following table presents the components of accrued liabilities.



	December 31,
	2013		2012
Salaries, benefits and related expenses	$	467.2	$	478.2
Office and related expenses	56.9		51.6
Acquisition obligations	12.8		29.5
Interest	16.0		42.4
Restructuring and other reorganization-related	46.7		3.6
Other	118.8		122.9
Total accrued liabilities	$	718.4	$	728.2

Results of operations include certain items that are not directly associated with our revenue-producing operations.



	Years ended December 31,
	2013			2012			2011
Loss on early extinguishment of debt	$	(45.2	)	$	0.0		$	0.0
Gains on sales of businesses and investments	1.5			88.2			125.9
Vendor discounts and credit adjustments	8.6			15.3			19.4
Other income (expense), net	2.8			(3.0		)	4.9
Total other (expense) income, net	$	(32.3	)	$	100.5		$	150.2

Loss on Early Extinguishment of Debt – During 2013, we recorded a charge of $45.2 related to the redemption of our 10.00% Notes. See Note 2 to the Consolidated Financial Statements for further information.

Sales of Businesses and Investments – During 2013, we recognized gains from the sale of marketable securities in the Asia Pacific region within our IAN segment and the sale of investments in our Rabbi Trusts, which was partially offset by a loss from the sale of a business in the United Kingdom within our IAN segment. During 2012, we recognized gains from the sale of our remaining holdings in Facebook and a business in an international market within our CMG segment, which were partially offset by losses from the sale of businesses within our IAN segment, as well as an adjustment relating to a reserve for a change in estimate in connection with a business disposed of in a prior year. During 2011, we recognized a gain from the sale of approximately half of our holdings in Facebook, which was partially offset by a loss relating to the sale of a business in the domestic market within our IAN segment.

Vendor Discounts and Credit Adjustments – In connection with the liabilities related to vendor discounts and credits established as part of the restatement we presented in our 2004 Annual Report on Form 10-K, these adjustments reflect the reversal of certain of these liabilities primarily where the statute of limitations has lapsed, or as a result of differences resulting from settlements with clients or vendors.

Other Income (Expense), net – During 2013, other income (expense), net primarily included a non-cash gain on re-measurement to fair value of an equity interest in an affiliate, located in the Asia Pacific region within our CMG segment, upon acquiring a controlling interest.

Share Repurchase Program

In February 2012, our Board of Directors (the "Board") authorized a share repurchase program to repurchase from time to time up to $300.0, excluding fees, of our common stock (the "2012 share repurchase program"). In November 2012, the Board authorized an increase in the amount available under our 2012 share repurchase program up to $400.0, excluding fees, of our common stock, as a result of the sale of our remaining holdings in Facebook. In February 2013, the Board authorized a new share repurchase program to repurchase from time to time up to $300.0, excluding fees, of our common stock (the "2013 share repurchase program"). In March 2013, the Board authorized an increase in the amount available under our 2013 share repurchase program up to $500.0, excluding fees, of our common stock to be used towards the repurchase of shares resulting from the conversion to common stock of the 4.75% Notes.

We may effect such repurchases through open market purchases, trading plans established in accordance with SEC rules, derivative transactions or other means.

The following table presents our share repurchase activity under our share repurchase programs.



	Years ended December 31,
	2013		2012		2011
Number of shares repurchased	31.8		32.7		41.7
Aggregate cost, including fees	$	481.8	$	350.5	$	400.8
Average price per share, including fees	$	15.17	$	10.72	$	9.62

We fully utilized the 2012 share repurchase program as of the second quarter of 2013. As of December 31, 2013, $118.6 remained available for repurchase under the 2013 share repurchase program. The 2013 share repurchase program has no expiration date.

Supplemental Cash Flow Information



	Years ended December 31,
	2013		2012		2011
Cash paid for interest	$	110.7	$	130.6	$	138.9
Cash paid for income taxes, net of refunds ¹	111.8		95.7		102.0


¹	Refunds of $15.0, $23.5 and $25.4 were received for the years ended December 31, 2013, 2012 and 2011, respectively.

Intangible Assets

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets

Intangible Assets

Goodwill

Goodwill is the excess purchase price remaining from an acquisition after an allocation of purchase price has been made to identifiable assets acquired and liabilities assumed based on estimated fair values. The changes in the carrying value of goodwill for our segments, IAN and CMG, for the years ended December 31, 2013 and 2012 are listed below.



	IAN			CMG			Total ¹
Balance as of December 31, 2011	$	2,952.9		$	491.4		$	3,444.3
Current year acquisitions	122.0			11.7			133.7
Contingent and deferred payments for prior acquisitions	2.2			0.0			2.2
Other ²	(2.5		)	2.9			0.4
Balance as of December 31, 2012	$	3,074.6		$	506.0		$	3,580.6
Current year acquisitions	58.8			16.5			75.3
Contingent and deferred payments for prior acquisitions	0.0			0.0			0.0
Other ²	(24.1		)	(2.8		)	(26.9		)
Balance as of December 31, 2013	$	3,109.3		$	519.7		$	3,629.0


¹	For all periods presented we have not recorded a goodwill impairment charge.


²	Primarily includes foreign currency translation adjustments.

See Note 1 for information regarding our annual impairment methodology.

Other Intangible Assets

Other intangible assets are comprised of assets with indefinite lives not subject to amortization and assets with definite lives subject to amortization. Other intangible assets primarily consist of customer lists and trade names, which have definitive lives and are subject to amortization on a straight-line basis with estimated useful lives generally between 7 and 15 years. Amortization expense for other intangible assets for the years ended December 31, 2013, 2012 and 2011 was $26.8, $23.4 and $20.2, respectively. There were no material impairment charges on other intangibles for the years ended December 31, 2013, 2012 and 2011. During 2013 and 2012, we recorded approximately $21.5 and $67.0 of intangible assets related to acquisitions made in the respective year.

The following table provides a summary of other intangible assets, which are included in other assets on our Consolidated Balance Sheets.



	December 31,
	2013							2012
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists	$	228.1	$	(119.8	)	$	108.3	$	184.0	$	(96.9	)	$	87.1
Trade names	64.5		(19.2		)	45.3		59.7		(15.5		)	44.2
Other	14.0		(3.8		)	10.2		15.1		(5.7		)	9.4
Total	$	306.6	$	(142.8	)	$	163.8	$	258.8	$	(118.1	)	$	140.7

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2013 is listed below.



	2014		2015		2016		2017		2018
Estimated amortization expense	$	34.6	$	34.3	$	26.8	$	10.8	$	9.5

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References+ Details

(Notes)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Income Taxes

The components of income before income taxes, equity earnings and the impact of noncontrolling interests are listed below.



	Years ended December 31,
	2013		2012		2011
Domestic	$	255.3	$	386.9	$	428.4
Foreign	212.7		287.9		310.0
Total	$	468.0	$	674.8	$	738.4

The provision for income taxes is listed below.



	Years ended December 31,
	2013			2012			2011
U.S. federal income taxes (including foreign withholding taxes):
Current	$	46.9		$	9.4		$	0.9
Deferred	25.2			118.1			92.3
	72.1			127.5			93.2
State and local income taxes:
Current	(14.7		)	17.1			12.3
Deferred	24.7			25.3			11.3
	10.0			42.4			23.6
Foreign income taxes:
Current	79.6			83.2			93.1
Deferred	19.5			(39.8		)	(19.7		)
	99.1			43.4			73.4
Total	$	181.2		$	213.3		$	190.2

A reconciliation of the effective income tax rate before equity earnings and the impact of noncontrolling interests as reflected in our Consolidated Statements of Operations to the U.S. federal statutory income tax rate is listed below.



	Years ended December 31,
	2013			2012			2011
U.S. federal statutory income tax rate	35.0		%	35.0		%	35.0		%

Income tax provision at U.S. federal statutory rate	$	163.8		$	236.2		$	258.4
State and local income taxes, net of federal income tax benefit	6.5			27.3			15.3
Impact of foreign operations, including withholding taxes	30.5			8.4			(21.9		)
Change in net valuation allowance ¹	3.2			(57.3		)	(32.9		)
Worthless securities deduction	(22.2		)	0.0			(23.0		)
Increases (decreases) in unrecognized tax benefits, net	0.0			24.1			(2.7		)
Other	(0.6		)	(25.4		)	(3.0		)
Provision for income taxes	$	181.2		$	213.3		$	190.2
Effective income tax rate on operations	38.7		%	31.6		%	25.8		%


¹	Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

In 2013, our effective income tax rate of 38.7% was positively impacted by the recognition of previously unrecognized tax benefits as a result of the recognition of losses attributable to worthless securities in a consolidated subsidiary and the settlement of the 2002-2006 New York State audit cycle. Our effective income tax rate was negatively impacted primarily by losses in certain foreign jurisdictions where we receive no tax benefit due to 100% valuation allowances.

In 2012, our effective income tax rate of 31.6% was positively impacted by the reversals of valuation allowances associated with the Asia Pacific and Continental Europe regions, of $26.2 and $21.8, respectively, as well as by a benefit derived from the deduction of foreign tax credits that previously had a full valuation allowance. Our effective income tax rate was negatively impacted by an adjustment of $19.5 associated with the establishment of a previously unrecorded reserve for a tax contingency for the years 2007 through 2010, losses in certain foreign locations where we receive no tax benefit due to 100% valuation allowances and state and local income taxes, net of federal income tax benefit.

The components of deferred tax assets and liabilities are listed below.



	December 31,
	2013			2012
Postretirement/post-employment benefits	$	32.5		$	40.4
Deferred compensation	187.2			192.4
Pension costs	31.1			27.0
Basis differences in fixed assets	(4.1		)	26.9
Rent	50.7			50.2
Interest	60.7			66.9
Accruals and reserves	39.6			51.1
Allowance for doubtful accounts	10.8			9.2
Basis differences in intangible assets	(402.2		)	(364.9		)
Investments in equity securities	48.6			(5.2		)
Tax loss/tax credit carry forwards	443.6			449.7
Restructuring and other reorganization-related costs	2.6			1.2
Other	60.5			88.3
Total deferred tax assets, net	561.6			633.2
Valuation allowance	(467.3		)	(392.9		)
Net deferred tax assets	$	94.3		$	240.3

We evaluate the realizability of our deferred tax assets on a quarterly basis. A valuation allowance is established when it is “more likely than not” that all or a portion of deferred tax assets will not be realized. In circumstances where there is negative evidence, establishment of a valuation allowance is considered. We believe that cumulative losses in the most recent three-year period represent significant negative evidence, and as a result, we determined that certain of our deferred tax assets required the establishment of a valuation allowance. The realization of our deferred tax assets is primarily dependent on future earnings. The amount of the deferred tax assets considered realizable could be reduced in the near future if estimates of future taxable income are lower than anticipated. The deferred tax assets for which an allowance was recognized relate primarily to state and foreign tax loss carryforwards.

The change in the valuation allowance is listed below.



	Years ended December 31,
	2013		2012			2011
Balance at beginning of period	$	392.9	$	489.9		$	508.1
Charged (reversed) to costs and expenses	65.2		(49.5		)	(25.1		)
Charged (reversed) to gross tax assets and other accounts	9.2		(47.5		)	6.9
Balance at end of period	$	467.3	$	392.9		$	489.9

In 2013, amounts charged to costs and expenses primarily relate to the increase in valuation allowances in the U.S. and Continental Europe regions for existing and additional deferred tax assets. The amounts charged to gross tax assets and other accounts relate primarily to the effect of foreign currency translation.

In 2012, amounts reversed to costs and expenses primarily relate to the net reversal of valuation allowances in the Asia Pacific and Continental Europe regions, based on positive evidence in the form of a sustained pattern of profitability. Amounts reversed to gross tax assets and other accounts relate primarily to the reversal of valuation allowance on foreign tax credits.

In 2011, amounts reversed to costs and expenses primarily relate to the utilization of capital loss carryforwards and the expiration of foreign tax credits on which 100% valuation allowances had been established, and the net reversal of valuation allowances based on positive evidence in the form of a sustained pattern of profitability. These reversals were partially offset by the establishment of an additional deferred tax asset and a corresponding valuation allowance for a Luxembourg tax loss carryforward.

As of December 31, 2013, there are $1,407.1 of loss carryforwards. These loss carryforwards are all non-U.S. tax loss carryforwards, of which $1,147.2 have unlimited carryforward periods and $259.9 have expiration periods from 2014 to 2032.

As of December 31, 2013 and 2012, we had $1,959.8 and $2,110.0, respectively, of undistributed earnings attributable to foreign subsidiaries. It is our intention to permanently reinvest undistributed earnings of our foreign subsidiaries. We have not provided deferred U.S. income taxes or foreign withholding taxes on temporary differences resulting from earnings for certain foreign subsidiaries which are permanently reinvested outside the U.S. It is not practicable to determine the amount of unrecognized deferred tax liability associated with these temporary differences.

The table below summarizes the activity related to our unrecognized tax benefits.



	December 31,
	2013			2012			2011
Balance at beginning of period	$	194.6		$	161.0		$	146.7
Increases as a result of tax positions taken during a prior year	8.3			28.2			5.3
Decreases as a result of tax positions taken during a prior year	(1.9		)	(6.8		)	(18.1		)
Settlements with taxing authorities	(34.9		)	(0.7		)	(5.0		)
Lapse of statutes of limitation	(10.6		)	(1.1		)	(0.2		)
Increases as a result of tax positions taken during the current year	63.7			14.0			32.3
Balance at end of period	$	219.2		$	194.6		$	161.0

Included in the total amount of unrecognized tax benefits of $219.2 as of December 31, 2013, is $207.9 of tax benefits that, if recognized, would impact the effective income tax rate. The total amount of accrued interest and penalties as of December 31, 2013 and 2012 is $11.9 and $13.5, respectively, of which a detriment of $2.8 and $1.4 is included in our 2013 and 2012 Consolidated Statements of Operations, respectively. In accordance with our accounting policy, interest and penalties accrued on unrecognized tax benefits are classified as income taxes in our Consolidated Statements of Operations.

In 2013, we settled the 2002-2006 NYS audit cycle. The settlement resulted in a minor cash payment and our effective income tax rate was positively impacted by the recognition of previously unrecognized tax benefits.

In 2011, we effectively settled the 2007-2008 IRS audit cycle. The settlement resulted in no cash payment and our effective income tax rate was positively impacted by the recognition of previously unrecognized tax benefits.

We have various tax years under examination by tax authorities in various countries, and in various states, such as New York, in which we have significant business operations. It is not yet known whether these examinations will, in the aggregate, result in our paying additional taxes. We believe our tax reserves are adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and, if necessary, adjust our reserves as additional information or events require.

With respect to all tax years open to examination by U.S. federal, various state and local, and non-U.S. tax authorities, we currently anticipate that total unrecognized tax benefits will decrease by an amount between $10.0 and $20.0 in the next twelve months, a portion of which will affect our effective income tax rate, primarily as a result of the settlement of tax examinations and the lapsing of statutes of limitations. This net decrease is related to various items of income and expense, primarily transfer pricing adjustments.

We are effectively settled with respect to U.S. income tax audits for years prior to 2009. With limited exceptions, we are no longer subject to state and local income tax audits for years prior to 1999, or non-U.S. income tax audits for years prior to 2005.

Restructuring and Related Activities Disclosure [Text Block]

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Restructuring and Other Reorganization-Related Charges (Reversals), net (Notes)

12 Months Ended

Dec. 31, 2013

Restructuring [Abstract]

Note 9: Restructuring and Other Reorganization-Related Charges (Reversals), net

The components of restructuring and other reorganization-related charges (reversals), net for 2013 and prior restructuring plans are listed below.



	Years ended December 31,
	2013		2012			2011
Severance and termination costs	$	55.9	$	0.0		$	(0.1	)
Lease termination costs	4.2		(1.1		)	1.3
Other exit costs	0.5		(0.1		)	(0.2		)
Total restructuring and other reorganization-related charges (reversals), net	$	60.6	$	(1.2	)	$	1.0

2013 Restructuring Plan

In the fourth quarter of 2013, the Company implemented a cost savings initiative (the "2013 Plan") to better align our cost structure with our revenue, primarily in Continental Europe. In connection with this initiative, the Company recorded pre-tax restructuring charges of $61.2 comprised of severance and termination costs of $55.9, lease terminations costs of $4.8, and other exit costs of $0.5. All restructuring actions were identified and initiated by the end of 2013, with all actions expected to be substantially completed by the end of the first quarter of 2014.

Severance and termination costs relate to a planned reduction in workforce of 541 employees. The employee groups affected include all levels and functions across the Company: executive, regional and account management and administrative, creative and media production personnel. Severance payments are expected to be substantially complete by the end of 2014.

Lease termination costs, net of estimated sublease income, relate to the offices that were vacated as part of the 2013 Plan. Given the remaining lease terms involved, the cash portion of the charge will be paid out over a period of several years. The charges related to leases terminated are recorded at fair value with the discount relating to lease terminations to be amortized over future periods. Other exit costs are principally related to legal fees.

A summary of the liability for restructuring charges related to the 2013 Plan is as follows:



	2013 Restructuring Expense		Non-Cash Items			2013 Cash Payments			Foreign Currency Adjustment		Liability at December 31, 2013
Severance and termination costs	$	55.9	$	0.0		$	(10.6	)	$	1.2	$	46.5
Lease termination costs	4.8		(0.5		)	(0.4		)	0.0		3.9
Other exit costs	0.5		0.0			0.0			0.0		0.5
Total	$	61.2	$	(0.5	)	$	(11.0	)	$	1.2	$	50.9

Net restructuring charges related to the 2013 Plan for the year ended December 31, 2013 was comprised of net charges of approximately $56 at IAN and $5 at CMG.

Prior Restructuring Plans

The 2007, 2003 and 2001 restructuring plans (the "Prior Restructuring Plans") with current year activity included net (reversals) charges that are adjustments primarily resulting from changes in management’s estimates relating to sublease rental income assumptions. For the years ended December 31, 2013, 2012 and 2011, the Prior Restructuring Plans incurred net restructuring and other reorganization-related (reversals) charges of $(0.6), $(1.2) and $1.0, respectively. As of December 31, 2013, the remaining liability for the Prior Restructuring Plans was $1.3.

Accumulated Other Comprehensive Loss [Abstract]

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References+ Details

Accumulated Other Comprehensive Loss, net of tax (Notes)

12 Months Ended

Dec. 31, 2013

Comprehensive Income (Loss) Note [Text Block]

Note 10: Accumulated Other Comprehensive Loss, Net of Tax

The following table presents the changes in accumulated other comprehensive loss, net of tax by component.



	Foreign Currency Translation Adjustments			Available-for-Sale Securities			Derivative Instruments			Defined Benefit Pension and Other Postretirement Plans			Total
Balance as of December 31, 2011	$	(140.9	)	$	0.2		$	0.0		$	(85.0	)	$	(225.7	)
Other comprehensive income (loss) before reclassifications	10.8			0.4			(21.9		)	(70.6		)	(81.3		)
Amount reclassified from accumulated other comprehensive loss, net of tax	0.0			0.2			9.2			9.6			19.0
Balance as of December 31, 2012	$	(130.1	)	$	0.8		$	(12.7	)	$	(146.0	)	$	(288.0	)
Other comprehensive (loss) income before reclassifications	(113.0		)	0.8			0.0			(19.7		)	(131.9		)
Amount reclassified from accumulated other comprehensive loss, net of tax	(0.6		)	(1.2		)	1.0			9.5			8.7
Balance as of December 31, 2013	$	(243.7	)	$	0.4		$	(11.7	)	$	(156.2	)	$	(411.2	)

Amounts reclassified from accumulated other comprehensive loss, net of tax for the year ended December 31, 2013 are as follows:



	Year ended December 31, 2013			Affected Line Item in the Consolidated Statement of Operations
Foreign currency translation adjustments	$	0.0
Gains on available-for-sale securities	(1.4		)	Other (expense) income, net
Losses on derivative instruments	1.7			Interest expense
Amortization of defined benefit pension and postretirement plans items ¹	10.8
Tax effect	(2.4		)	Provision for income taxes
Total amount reclassified from accumulated other comprehensive loss, net of tax	$	8.7


¹	These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 13 for further information

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]

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+ Details

Incentive Compensation Plans (Notes)

12 Months Ended

Dec. 31, 2013

Incentive Compensation Plans

2009 Performance Incentive Plan

We issue stock and cash-based incentive awards to our employees under a plan established by the Compensation and Leadership Talent Committee of the Board of Directors (the “Compensation Committee”) and approved by our shareholders. In May 2009, our shareholders approved the 2009 Performance Incentive Plan (the “2009 PIP”), which replaced previous incentive plans. The number of shares of common stock initially available for granting new stock options and stock appreciation rights under the 2009 PIP was 8.1. The number of shares of common stock initially available for performance-based awards and other stock-based awards under the 2009 PIP was 26.5. Subject to the terms of the 2009 PIP, there are limits on the number of shares that may be awarded to any one participant for each type of award. The vesting period of awards granted is generally commensurate with the requisite service period. We generally issue new shares to satisfy the exercise of stock options or the distribution of other stock-based awards.

Additionally, under the 2009 PIP, we are able to grant performance cash awards. The performance cash awards are granted to certain employees who otherwise would have been eligible to receive performance-based stock awards. These awards have a service period vesting condition and a performance vesting condition. The amount of the performance cash award received by an employee with a performance vesting condition can range from 0% to 300% of the target amount of the original grant value. Performance cash awards generally vest in three years. A committee of the Board of Directors may grant performance cash awards to any eligible employee; however, no employee can receive more than $6.0 during a performance period. Performance cash awards may be settled in shares on the vest date. The number of shares to be settled on the vesting date will be calculated as the cash value adjusted for performance divided by our stock price on the vesting date.

The amount of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statement of Operations, and the related tax benefit, are listed below.



	Years ended December 31,
	2013		2012		2011
Stock options	$	3.7	$	5.4	$	6.7
Stock-settled awards	9.8		14.9		21.9
Cash-settled awards	1.5		3.9		5.7
Performance-based awards	29.6		24.5		23.3
Employee stock purchase plan	0.6		0.6		0.7
Other ¹	0.8		1.1		4.1
Stock-based compensation expense	$	46.0	$	50.4	$	62.4
Tax benefit	$	17.6	$	19.7	$	22.1


¹	Represents charges recorded for severance expense related to stock-based compensation awards.

Stock Options

Stock options are granted with the exercise price equal to the fair market value of our common stock on the grant date. They are generally exercisable between two and four years from the grant date and expire ten years from the grant date (or earlier in the case of certain terminations of employment).

The following tables are a summary of stock option activity during 2013.



	Options		Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2013	14.1		$9.76
Granted	0.7		12.79
Exercised	(5.2	)	9.25
Cancelled/expired	(0.1	)	12.34
Forfeited	(0.1	)	5.35
Stock options outstanding as of December 31, 2013	9.4		10.24		4.4	$	70.0
Stock options vested and expected to vest as of December 31, 2013	9.4		10.24		4.4	$	69.8
Stock options exercisable as of December 31, 2013	7.9		9.92		3.6	$	61.3

	Options		Weighted- Average Grant Date Fair Value (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Non-vested as of January 1, 2013	3.9		$	3.29
Granted	0.7		4.14
Vested	(3.0	)	3.02
Forfeited	(0.1	)	3.01
Non-vested as of December 31, 2013	1.5		4.21		8.2	$	8.6

There were 5.2, 1.2 and 1.3 stock options exercised in 2013, 2012 and 2011, respectively. The total intrinsic value of stock options exercised during 2013, 2012 and 2011 was $26.2, $2.0 and $3.2, respectively. The cash received from the stock options exercised in 2013, 2012 and 2011 was $59.5, $11.7 and $13.3, respectively. As of December 31, 2013, there was $3.3 of total unrecognized compensation expense related to non-vested stock options granted, which is expected to be recognized over a weighted-average period of 1.4 years.

We use the Black-Scholes option-pricing model to estimate the fair value of options granted, which requires the input of subjective assumptions including the option’s expected term and the price volatility of the underlying stock. Changes in the assumptions can materially affect the estimate of fair value and our results of operations could be materially impacted. The weighted-average grant-date fair value per option during the years ended December 31, 2013, 2012 and 2011 was $4.14, $4.24 and $4.57, respectively.

The fair value of each option grant has been estimated with the following weighted-average assumptions.



	Years ended December 31,
	2013		2012		2011
Expected volatility ¹	40.2	%	43.8	%	39.9	%
Expected term (years) ²	6.9		6.8		6.7
Risk free interest rate ³	1.3	%	1.3	%	2.8	%
Expected dividend yield ⁴	2.4	%	2.1	%	1.9	%


¹	The expected volatility used to estimate the fair value of stock options awarded is based on a blend of: (i) historical volatility of our common stock for periods equal to the expected term of our stock options and (ii) implied volatility of tradable forward put and call options to purchase and sell shares of our common stock.

The estimate of our expected term is based on the average of (i) an assumption that all outstanding options are exercised upon achieving their full vesting date and (ii) an assumption that all outstanding options will be exercised at the midpoint between the current date (i.e., the date awards have ratably vested through) and their full contractual term. In determining the estimate, we considered several factors, including the historical option exercise behavior of our employees and the terms and vesting periods of the options.


³	The risk free rate is determined using the implied yield currently available for zero-coupon U.S. government issuers with a remaining term equal to the expected term of the options.


⁴	The expected dividend yield is calculated based on an annualized dividend of $0.30 per share in 2013 and $0.24 per share in 2012 and 2011.

Stock-Based Compensation

We grant other stock-based compensation awards such as stock-settled awards, cash-settled awards and performance-based awards (settled in cash or shares) to certain key employees. The number of shares or units received by an employee for performance-based awards depends on Company performance against specific performance targets and could range from 0% to 300% of the target amount of shares originally granted. Incentive awards are subject to certain restrictions and vesting requirements as determined by the Compensation Committee. The fair value of the shares on the grant date is amortized over the vesting period, which is generally three years. Upon completion of the vesting period for cash-settled awards, the grantee is entitled to receive a payment in cash based on the fair market value of the corresponding number of shares of common stock. No monetary consideration is paid by a recipient for any incentive award. The fair value of cash-settled awards is adjusted each quarter based on our share price. The holders of stock-settled awards have absolute ownership interest in the underlying shares of common stock prior to vesting, which includes the right to vote and receive dividends. Dividends declared on common stock are accrued during the vesting period and paid when the award vests. The holders of cash-settled and performance-based awards have no ownership interest in the underlying shares of common stock until the awards vest and the shares of common stock are issued.

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2013 and 2012.



	Years ended December 31,
	2013		2012		2011
Stock-Settled Awards:
Awards granted	1.1		0.9		0.8
Weighted-average grant-date fair value (per award)	$	13.51	$	11.43	$	11.94
Total fair value of vested awards distributed	$	35.4	$	63.5	$	63.1
Cash-Settled Awards:
Awards granted	0.1		0.1		0.0
Weighted-average grant-date fair value (per award)	$	16.35	$	10.94	$	8.96
Total fair value of vested awards distributed	$	5.4	$	11.1	$	10.4
Performance-Based Awards:
Awards granted	1.5		1.8		1.8
Weighted-average grant-date fair value (per award)	$	11.97	$	10.61	$	11.58
Total fair value of vested awards distributed	$	17.7	$	11.5	$	30.8

In conjunction with common stock dividends declared in 2013 and 2012, we accrued dividends of $0.7 and $1.1, respectively, on non-vested stock-settled awards and paid $1.5 and $1.7 for stock-settled awards that vested during 2013 and 2012, respectively.

A summary of the activity of our non-vested stock-settled awards, cash-settled awards, and performance-based awards during 2013 is presented below (performance-based awards are shown at 100% of the shares originally granted).



	Stock-Settled Awards					Cash-Settled Awards					Performance-Based Awards
	Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2013	3.8			$	9.55	0.5			$	8.62	2.7			$	11.57
Granted	1.1			13.51		0.1			16.35		1.5			11.97
Vested	(2.8		)	8.98		(0.4		)	8.52		0.0			9.93
Forfeited	(0.2		)	10.40		(0.1		)	14.18		(0.1		)	11.91
Non-vested as of December 31, 2013	1.9			12.54		0.1			12.03		4.1			11.71
Total unrecognized compensation expense remaining	$	8.6				$	1.0				$	16.7
Weighted-average years expected to be recognized over	1.7					1.8					1.9

During 2013, 2012 and 2011, additional performance cash awards with a total target value of $35.6, $33.6 and $31.9 respectively, were awarded under the 2009 PIP and will be settled in shares upon vesting, which is three years from the grant date. As of December 31, 2013, there was $31.9 of total unrecognized compensation expense related to these awards, which is expected to be recognized over a remaining weighted-average period of 1.9 years.

In conjunction with our annual grant of long-term incentive compensation awards, we reviewed our estimates and assumptions in 2013, which resulted in an increase to our estimated forfeiture rate, as our review of our actual forfeitures indicated a higher level of forfeitures than previously assumed.

2009 Restricted Cash Plan

In March 2009, the Compensation Committee approved the Interpublic Restricted Cash Plan (the “Cash Plan”). Under the Cash Plan, the Board, the Compensation Committee or the Plan Administrator may grant cash awards to certain employees eligible to receive stock-settled and cash-settled awards. Cash awards, when granted, have a service period vesting condition and generally vest in three years.

Cash Awards

During the years ended December 31, 2013, 2012 and 2011, the Compensation Committee granted cash awards under the Cash Plan with a total target value of $4.6, $2.7 and $4.2, respectively, and we recognized $4.0, $10.9 and $16.6, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

During the years ended December 31, 2013, 2012 and 2011, the Compensation Committee granted performance awards to be settled in cash under the 2009 PIP with a total target value of $47.4, $37.4, and $39.3, respectively, and we recognized $18.3, $18.9 and $22.0, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

We amortize the present value of the amount expected to vest for cash awards and performance cash awards over the vesting period using the straight-line method, less an assumed forfeiture rate. Cash awards do not fall within the scope of the authoritative guidance for stock compensation as they are not paid in equity and the value of the award is not correlated with our stock price. Due to the cash nature of the payouts and the vesting period, we account for these awards in accordance with authoritative guidance for deferred compensation arrangements.

Employee Stock Purchase Plans

The Interpublic Group of Companies Employee Stock Purchase Plan (the “ESPP Plan”) became active April 1, 2007. Under the ESPP Plan, eligible employees may purchase our common stock through payroll deductions not exceeding 10% of their eligible compensation or 900 (actual number) shares each offering period. The price an employee pays for a share of common stock under the ESPP Plan is 90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months. An aggregate of 15.0 shares are reserved for issuance under the ESPP Plan, of which 2.6 shares have been issued through December 31, 2013.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Fair Value Measurements (Notes)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Fair Value Measurements

Authoritative guidance for fair value measurements establishes a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:



Level 1		Unadjusted quoted prices in active markets for identical assets or liabilities. An active market for the asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.

Level 2		Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3		Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Financial Instruments that are Measured at Fair Value on a Recurring Basis

We primarily apply the market approach to determine the fair value of financial instruments that are measured at fair value on a recurring basis. There were no changes to our valuation techniques used to determine the fair value of financial instruments during 2013 as compared to the prior year.

The following tables present information about our financial instruments measured at fair value on a recurring basis as of December 31, 2013 and 2012, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.



	December 31, 2013												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	761.2		$	0.0		$	0.0		$	761.2		Cash and cash equivalents
Short-term marketable securities	5.3			0.0			0.0			5.3			Marketable securities
Long-term investments	1.6			0.0			0.0			1.6			Other assets
Total	$	768.1		$	0.0		$	0.0		$	768.1

As a percentage of total assets	6.0		%	0.0		%	0.0		%	6.0		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	27.0		$	27.0

	December 31, 2012												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	1,806.6		$	0.0		$	0.0		$	1,806.6		Cash and cash equivalents
Short-term marketable securities	16.0			0.0			0.0			16.0			Marketable securities
Long-term investments	1.5			0.0			0.0			1.5			Other assets
Total	$	1,824.1		$	0.0		$	0.0		$	1,824.1

As a percentage of total assets	13.5		%	0.0		%	0.0		%	13.5		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	25.3		$	25.3

Relates to unconditional obligations to purchase additional noncontrolling equity shares of consolidated subsidiaries. Fair value measurement of the obligation was based upon the amount payable as if the forward contracts were settled. The amount redeemable within the next twelve months is classified in accrued liabilities; any interests redeemable thereafter are classified in other non-current liabilities.

The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which we utilize Level 3 inputs to determine fair value.



	Years ended December 31,
Liabilities	2013		2012
Mandatorily redeemable noncontrolling interests - Balance at beginning of period	$	25.3	$	58.9
Level 3 additions	0.2		0.0
Level 3 reductions	0.0		(34.9		)
Realized losses included in net income	1.5		1.4
Foreign currency translation	0.0		(0.1		)
Mandatorily redeemable noncontrolling interests - Balance at end of period	$	27.0	$	25.3

Level 3 reductions primarily consist of cash payments made related to unconditional obligations to purchase additional equity interests in previous acquisitions, which are classified within the financing section of our Consolidated Statements of Cash Flows. Level 3 additions relate to new unconditional obligations to purchase additional equity interests in previous acquisitions for cash in future periods. Realized losses included in net income for mandatorily redeemable noncontrolling interests are reported as a component of interest expense in our Consolidated Statements of Operations.

Gross unrealized and realized gains and losses for our long-term investments and short-term marketable securities were not material for the years ended December 31, 2013, 2012 and 2011.

Financial Instruments that are not Measured at Fair Value on a Recurring Basis

The following table presents information about our financial instruments that are not measured at fair value on a recurring basis as of December 31, 2013, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.



	December 31, 2013
	Level 1		Level 2		Level 3		Total
Total long-term debt	$	0.0	$	1,367.5	$	87.2	$	1,454.7

Our long-term debt comprises senior notes and other notes payable. The fair value of our senior notes traded over-the-counter is based on quoted prices for such securities, but which fair value can also be derived from inputs that are readily observable. Therefore, these senior notes are classified as Level 2 within the fair value hierarchy. Our other notes payable are not actively traded and their fair value is not solely derived from readily observable inputs. Thus, the fair value of our other notes payable is determined based on a discounted cash flow model and other proprietary valuation methods, and therefore is classified as Level 3 within the fair value hierarchy. See Note 2 for further information on our long-term debt.

Non-financial Instruments that are Measured at Fair Value on a Recurring Basis

Certain non-financial instruments are measured at fair value on a recurring basis, primarily accrued restructuring charges. As of December 31, 2013, accrued restructuring charges was $52.2, which was valued using our internal estimates using a discounted cash flow model and is classified as Level 3 in the fair value hierarchy.

Non-financial Instruments that are Measured at Fair Value on a Nonrecurring Basis

Certain non-financial instruments are measured at fair value on a nonrecurring basis, primarily goodwill, intangible assets, and property, plant and equipment. Accordingly, these assets are not measured and adjusted to fair value on an ongoing basis but are subject to periodic evaluations for potential impairment.

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References+ Details

Employee Benefits (Notes)

12 Months Ended

Dec. 31, 2013

Employee Benefits

Pension and Postretirement Benefit Plans

We have a defined benefit pension plan (the “Domestic Pension Plan”) that consists of approximately 4,000 participants and has been closed to new participants. We also have numerous funded and unfunded plans outside the U.S. The Interpublic Limited Pension Plan in the U.K. is a defined benefit plan and is our most material foreign pension plan in terms of the benefit obligation and plan assets. Some of our domestic and foreign subsidiaries provide postretirement health benefits and life insurance to eligible employees and, in certain cases, their dependents. The domestic postretirement benefit plan is our most material postretirement benefit plan in terms of the benefit obligation. This plan consists of approximately 2,300 participants, is closed to new participants and is unfunded.

Differences between the aggregate income statement and balance sheet amounts listed in the tables below and the totals reported in our Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income and Consolidated Balance Sheets relate to non-material foreign pension and postretirement benefit plans.

Pension and Postretirement Benefit Obligation

The change in the benefit obligation, the change in plan assets, the funded status and amounts recognized for the domestic pension plan, the significant foreign pension plans and the domestic postretirement benefit plan are listed below.



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2013			2012			2013			2012			2013			2012
Benefit Obligation
Projected benefit obligation as of January 1	$	140.6		$	129.0		$	532.4		$	456.6		$	46.6		$	50.8
Service cost	0.0			0.0			9.9			10.2			0.1			0.2
Interest cost	5.5			6.3			21.7			21.9			1.6			2.3
Benefits paid	(10.4		)	(10.8		)	(23.8		)	(20.4		)	(6.4		)	(5.9		)
Plan participant contributions	0.0			0.0			0.5			0.6			1.7			1.7
Actuarial (gains) losses	(2.6		)	16.1			25.0			60.0			(5.7		)	(2.5		)
Settlements and curtailments	0.0			0.0			(3.1		)	(6.5		)	0.0			0.0
Foreign currency effect	0.0			0.0			8.1			8.9			0.0			0.0
Other	0.0			0.0			(0.8		)	1.1			0.0			0.0

Projected benefit obligation as of December 31	$	133.1		$	140.6		$	569.9		$	532.4		$	37.9		$	46.6

Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	115.7		$	107.2		$	381.7		$	363.6		$	0.0		$	0.0
Actual return on plan assets	3.8			13.7			19.5			17.6			0.0			0.0
Employer contributions	0.5			5.6			18.3			17.7			4.7			4.2
Plan participant contributions	0.0			0.0			0.5			0.6			1.7			1.7
Benefits paid	(10.4		)	(10.8		)	(23.8		)	(20.4		)	(6.4		)	(5.9		)
Settlements	0.0			0.0			(2.7		)	(6.1		)	0.0			0.0
Foreign currency effect	0.0			0.0			5.0			8.7			0.0			0.0
																0.0
Fair value of plan assets as of December 31	$	109.6		$	115.7		$	398.5		$	381.7		$	0.0		$	0.0

Funded status of the plans at December 31	$	(23.5	)	$	(24.9	)	$	(171.4	)	$	(150.7	)	$	(37.9	)	$	(46.6	)



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2013			2012			2013			2012			2013			2012
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0		$	0.0		$	8.0		$	7.4		$	0.0		$	0.0
Current liability	0.0			0.0			(7.6		)	(8.4		)	(4.2		)	(4.6		)
Non-current liability	(23.5		)	(24.9		)	(171.8		)	(149.7		)	(33.7		)	(42.0		)

Net liability recognized	$	(23.5	)	$	(24.9	)	$	(171.4	)	$	(150.7	)	$	(37.9	)	$	(46.6	)

Accumulated benefit obligation	$	133.1		$	140.6		$	540.9		$	508.5

Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss (gain)	$	47.0		$	53.6		$	141.0		$	115.7		$	(1.5	)	$	4.2
Prior service cost (credit)	0.0			0.0			1.5			1.8			(0.1		)	(0.2		)
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.0

Total amount recognized	$	47.0		$	53.6		$	142.5		$	117.5		$	(1.6	)	$	4.0

In 2014, we estimate that we will recognize $6.6 and $3.5 of net actuarial losses from accumulated other comprehensive loss, net into net periodic cost related to our domestic pension plan and significant foreign pension plans, respectively.



	Domestic Pension Plan				Foreign Pension Plans
December 31,	2013		2012		2013		2012
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	$	133.1	$	140.6	$	553.2	$	515.8
Aggregate accumulated benefit obligation	133.1		140.6		528.7		497.3
Aggregate fair value of plan assets	109.6		115.7		374.7		358.5

Net Periodic Cost

The components of net periodic benefit cost and key assumptions are listed below.



	Domestic Pension Plan									Foreign Pension Plans									Domestic Postretirement Benefit Plan
Years ended December 31,	2013			2012			2011			2013			2012			2011			2013			2012			2011
Service cost	$	0.0		$	0.0		$	0.0		$	9.9		$	10.2		$	9.6		$	0.1		$	0.2		$	0.2
Interest cost	5.5			6.3			6.8			21.7			21.9			23.3			1.6			2.3			2.7
Expected return on plan assets	(7.7		)	(7.7		)	(7.5		)	(19.2		)	(18.2		)	(19.0		)	0.0			0.0			0.0
Settlement and curtailment (gains) losses	0.0			0.0			0.0			(0.1		)	0.7			0.0			0.0			0.0			0.0
Amortization of:
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.0			0.0			0.2			0.1
Prior service cost (credit)	0.0			0.0			0.0			0.2			0.2			0.2			(0.1		)	(0.1		)	(0.1		)
Unrecognized actuarial losses	7.9			6.4			6.6			2.8			1.0			0.7			0.0			0.0			0.0
Net periodic cost	$	5.7		$	5.0		$	5.9		$	15.3		$	15.8		$	14.8		$	1.6		$	2.6		$	2.9

Assumptions



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2013		2012		2011		2013		2012		2011		2013		2012		2011
Net periodic cost
Discount rate	4.00	%	5.00	%	5.50	%	4.32	%	5.00	%	5.45	%	4.00	%	5.00	%	5.50	%
Rate of compensation increase	N/A		N/A		N/A		3.57	%	3.66	%	4.37	%	N/A		N/A		N/A
Expected return on plan assets	7.00	%	7.25	%	7.50	%	5.24	%	5.02	%	5.88	%	N/A		N/A		N/A
Benefit obligation
Discount rate	4.85	%	4.00	%	5.00	%	4.29	%	4.32	%	5.00	%	4.85	%	4.00	%	5.00	%
Rate of compensation increase	N/A		N/A		N/A		3.97	%	3.57	%	3.66	%	N/A		N/A		N/A
Health care cost trend rate assumed for next year
Initial rate (weighted-average)													7.50	%	8.00	%	8.00	%
Year ultimate rate is reached													2019		2019		2016
Ultimate rate													5.00	%	5.00	%	5.50	%

Discount Rates – At December 31, 2013, 2012 and 2011, we determined our discount rates for our domestic pension plan, foreign pension plans and domestic postretirement benefit plan based on either a bond selection/settlement approach or bond yield curve approach. Using the bond selection/settlement approach, we determine the discount rate by selecting a portfolio of corporate bonds appropriate to provide for the projected benefit payments. Using the bond yield curve approach, we determine the discount rate by matching the plans' cash flows to spot rates developed from a yield curve. Both approaches utilize high quality AA-rated corporate bonds and the plans' projected cash flows to develop a discounted value of the benefit payments, which is then used to develop a single discount rate. In countries where markets for high-quality long-term AA corporate bonds are not well developed, a portfolio of long-term government bonds is used as a basis to develop hypothetical corporate bond yields, which serve as a basis to derive the discount rate.

Expected Return on Assets – Our expected rate of return is determined at the beginning of each year and considers asset class index returns over various market and economic conditions, current and expected market conditions, risk premiums associated with asset classes and long-term inflation rates. We determine both a short-term and long-term view and then select a long-term rate of return assumption that matches the duration of our liabilities.

Fair Value of Pension Plan Assets

The following table presents the fair value of our domestic and foreign pension plan assets as of December 31, 2013 and 2012, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. See Note 12 for a description of the fair value hierarchy.



	December 31, 2013								December 31, 2012
Asset Class	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Investment funds	$	22.2	$	359.1	$	25.4	$	406.7	$	22.3	$	327.9	$	48.2	$	398.4
Insurance contracts	0.0		22.0		0.0		22.0		0.0		24.8		0.0		24.8
Limited partnerships	0.0		0.0		36.1		36.1		0.0		0.0		39.8		39.8
Other	40.2		2.5		0.6		43.3		28.6		5.5		0.3		34.4
Total	$	62.4	$	383.6	$	62.1	$	508.1	$	50.9	$	358.2	$	88.3	$	497.4

Investment funds include mutual funds, common/collective trusts, hedge funds and other commingled assets that are invested primarily in equity and fixed income securities. Mutual funds, which are publicly traded, are primarily valued using recently reported sales prices. Investment funds, which are not publicly traded, are valued based on the net asset value of shares held by the plan at year end, which reflects the fair value of the underlying investments. Insurance contracts are valued based on the cash surrender value of the contract. Limited partnerships are invested primarily in equity and fixed income securities. Other investments primarily include cash and cash equivalents, equity securities, derivatives and fixed income securities such as government and investment-grade corporate bonds.

The following table presents additional information about our domestic and foreign pension plan assets for which we utilize Level 3 inputs to determine fair value.



	Year ended December 31, 2013											Year ended December 31, 2012
	Investment Funds			Limited Partnerships			Other		Total			Investment Funds		Limited Partnerships			Other		Total
Balance at beginning of period	$	48.2		$	39.8		$	0.3	$	88.3		$	43.8	$	41.1		$	0.1	$	85.0
Actual return on assets:
Assets sold during the year	0.6			0.0			0.0		0.6			0.0		0.0			0.0		0.0
Assets still held at year end	1.9			(2.9		)	0.2		(0.8		)	2.2		(1.3		)	0.0		0.9
Net purchases, sales and settlements	(25.3		)	(0.8		)	0.1		(26.0		)	2.2		0.0			0.2		2.4
Balance at end of period	$	25.4		$	36.1		$	0.6	$	62.1		$	48.2	$	39.8		$	0.3	$	88.3

Asset Allocation

The primary investment goal for our plans’ assets is to maximize total asset returns while ensuring the plans’ assets are available to fund the plans’ liabilities as they become due. The plans’ assets in aggregate and at the individual portfolio level are invested so that total portfolio risk exposure and risk-adjusted returns best achieve this objective. The aggregate amount of our own stock held as investment for our domestic and foreign pension funds is considered negligible relative to the total fund assets. As of December 31, 2013, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.



			December 31,
Asset Class	2014 Target Allocation		2013		2012
Equity securities	24	%	24	%	22	%
Fixed income securities	47	%	43	%	44	%
Real estate	7	%	5	%	5	%
Other	22	%	28	%	29	%
Total	100	%	100	%	100	%

Cash Flows

During 2013, we contributed $0.5 and $18.3 of cash to our domestic and foreign pension plans, respectively. For 2014, we expect to contribute approximately $3.0 and $25.0 of cash to our domestic and foreign pension plans, respectively.

The following estimated future benefit payments, which reflect future service, as appropriate, are expected to be paid in the years indicated below.



Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2014	$	10.7	$	22.1	$	4.6
2015	10.4		24.2		4.5
2016	10.1		25.4		4.3
2017	9.9		25.1		4.1
2018	9.6		26.5		3.9
2019 - 2023	44.3		151.4		15.8

The estimated future payments for our domestic postretirement benefit plan is before any estimated federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003.

The following federal subsidies are expected to be received in the years indicated below.



Years	Domestic Postretirement Benefit Plan
2014	$	0.4
2015	0.4
2016	0.4
2017	0.5
2018	0.5
2019 - 2023	1.6

Savings Plans

We sponsor defined contribution plans (the “Savings Plans”) that cover substantially all domestic employees. The Savings Plans permit participants to make contributions on a pre-tax and/or after-tax basis and allow participants to choose among various investment alternatives. We match a portion of participant contributions based upon their years of service. Amounts expensed for the Savings Plans for 2013, 2012 and 2011 were $37.7, $35.6 and $35.4, respectively. Expense includes a discretionary Company contribution of $4.9, $4.8 and $3.7 offset by participant forfeitures of $3.3, $3.0 and $2.6 in 2013, 2012 and 2011, respectively. In addition, we maintain defined contribution plans in various foreign countries and contributed $36.9, $34.0 and $30.8 to these plans in 2013, 2012 and 2011, respectively.

Deferred Compensation and Benefit Arrangements

We have deferred compensation arrangements which (i) permit certain of our key officers and employees to defer a portion of their salary or incentive compensation, or (ii) require us to contribute an amount to the participant’s account. The arrangements typically provide that the participant will receive the amounts deferred plus interest upon attaining certain conditions, such as completing a certain number of years of service or upon retirement or termination. As of December 31, 2013 and 2012, the deferred compensation liability balance was $92.7 and $90.0, respectively. Amounts expensed for deferred compensation arrangements in 2013, 2012 and 2011 were $13.4, $9.8 and $7.6, respectively.

We have deferred benefit arrangements with certain key officers and employees that provide participants with an annual payment, payable when the participant attains a certain age and after the participant’s employment has terminated. The deferred benefit liability was $166.2 and $173.8 as of December 31, 2013 and 2012, respectively. Amounts expensed for deferred benefit arrangements in 2013, 2012 and 2011 were $14.0, $15.0 and $14.8, respectively.

We have purchased life insurance policies on participants’ lives to assist in the funding of the related deferred compensation and deferred benefit liabilities. As of December 31, 2013 and 2012, the cash surrender value of these policies was $162.3 and $150.2, respectively. In addition to the life insurance policies, certain investments are held for the purpose of paying the deferred compensation and deferred benefit liabilities. These investments, along with the life insurance policies, are held in a separate revocable trust for the purpose of paying the deferred compensation and the deferred benefit arrangement liabilities. As of December 31, 2013 and 2012, the value of such investments in the trust was $7.7 and $5.9, respectively. The short-term investments are included in cash and cash equivalents, and the long-term investments and cash surrender value of the policies are included in other assets.

Long-Term Disability Plan

We have a long-term disability plan which provides income replacement benefits to eligible participants who are unable to perform their job duties during the first 24 months of disability. Income replacement benefits are continued thereafter if the participant is unable to perform any job related to his or her education, training or experience. As all income replacement benefits are fully insured, no related obligation is required as of December 31, 2013 and 2012. In addition to income replacement benefits, plan participants may remain covered for certain health and life insurance benefits up to age 65, and accordingly, we have recorded an obligation of $10.5 and $11.3 as of December 31, 2013 and 2012, respectively.

Segment Information (Notes)

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Segment Information

As of December 31, 2013, we have two reportable segments, which are IAN and CMG. IAN is comprised of McCann Worldgroup, Draftfcb, Lowe & Partners, IPG Mediabrands, our digital specialist agencies, and our domestic integrated agencies. CMG is comprised of a number of our specialist marketing services offerings. We also report results for the “Corporate and other” group.

Within IAN, our agencies provide a comprehensive array of global communications and marketing services, each offering a distinctive range of solutions for our clients. Our digital specialist agencies provide unique digital capabilities and service their own client rosters while also serving as key digital partners. In addition, our domestic integrated agencies, including Hill Holliday, Carmichael Lynch and Mullen, provide a full range of advertising, marketing communications services and/or marketing services and partner with our global operating divisions as needed. IAN’s operating divisions share similar economic characteristics and are similar in other areas, specifically related to the nature of their services, the manner in which the services are provided and the similarity of their respective customers.

CMG, which includes Weber Shandwick, FutureBrand, DeVries, GolinHarris, Jack Morton, and Octagon Worldwide, provides clients with diversified services, including public relations, meeting and event production, sports and entertainment marketing, corporate and brand identity and strategic marketing consulting. CMG shares some similarities with service lines offered by IAN; however, on an aggregate basis, CMG has a higher proportion of arrangements for which they act as principal, a different distribution model than IAN and different margin structure.

The profitability measure employed by our chief operating decision maker for allocating resources to operating divisions and assessing operating division performance is operating income, excluding the impact of restructuring and other reorganization-related charges (reversals), net. With the exception of excluding these amounts from reportable segment operating income, all segments follow the same accounting policies as those described in Note 1.

Certain corporate and other charges are reported as a separate line item within total segment operating income and include corporate office expenses, as well as shared service center expenses and certain other centrally managed expenses that are not fully allocated to operating divisions. Salaries and related expenses include salaries, long-term incentive awards, annual bonuses and other miscellaneous benefits for corporate office employees. Office and general expenses primarily include professional fees related to internal control compliance, financial statement audits and legal, information technology and other consulting services, which are engaged and managed through the corporate office. In addition, office and general expenses includes rental expense and depreciation of leasehold improvements for properties occupied by corporate office employees. A portion of centrally managed expenses are allocated to operating divisions based on a formula that uses the planned revenues of each of the operating units. Amounts allocated also include specific charges for information technology-related projects, which are allocated based on utilization.

Summarized financial information concerning our reportable segments is shown in the following table.



	Years ended December 31,
	2013			2012			2011
Revenue:
IAN	$	5,795.6		$	5,728.5		$	5,891.8
CMG	1,326.7			1,227.7			1,122.8
Total	$	7,122.3		$	6,956.2		$	7,014.6

Segment operating income:
IAN	$	662.1		$	700.2		$	728.8
CMG	137.6			114.2			101.4
Corporate and other	(140.8		)	(137.3		)	(142.0		)
Total	658.9			677.1			688.2

Restructuring and other reorganization-related (charges) reversals, net	(60.6		)	1.2			(1.0		)
Interest expense	(122.7		)	(133.5		)	(136.8		)
Interest income	24.7			29.5			37.8
Other (expense) income, net	(32.3		)	100.5			150.2
Income before income taxes	$	468.0		$	674.8		$	738.4

Depreciation and amortization of fixed assets and intangible assets:
IAN	$	126.0		$	119.7		$	125.7
CMG	15.6			14.4			12.8
Corporate and other	15.8			13.6			12.4
Total	$	157.4		$	147.7		$	150.9

Capital expenditures:
IAN	$	109.0		$	97.5		$	94.1
CMG	18.5			26.7			16.9
Corporate and other	45.5			45.0			29.3
Total	$	173.0		$	169.2		$	140.3

	December 31,
	2013			2012
Total assets:
IAN	$	11,425.1		$	11,035.3
CMG	1,203.8			1,073.1
Corporate and other	276.1			1,385.5
Total	$	12,905.0		$	13,493.9

Revenue and long-lived assets, excluding intangible assets, are presented by major geographic area in the following table.



	Revenue						Long-Lived Assets
	Years ended December 31,						December 31,
	2013		2012		2011		2013		2012
Domestic	$	3,972.6	$	3,803.6	$	3,887.7	$	545.7	$	502.5
International:
United Kingdom	568.3		572.0		539.4		60.8		64.3
Continental Europe	800.6		823.1		908.9		79.6		76.0
Asia Pacific	868.9		838.1		741.7		88.8		88.0
Latin America	464.5		450.1		444.4		72.3		70.5
Other	447.4		469.3		492.5		37.1		38.8
Total International	3,149.7		3,152.6		3,126.9		338.6		337.6
Total Consolidated	$	7,122.3	$	6,956.2	$	7,014.6	$	884.3	$	840.1

Revenue is primarily attributed to geographic areas based on where the services are performed. Furniture, equipment and leasehold improvements are allocated based upon physical location. Other assets and investments are allocated based on the location of the related operations.

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

Commitments and Contingencies Disclosure [Abstract]

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+ Details

Commitments and Contingencies (Notes)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies

Leases

We lease office premises and equipment. Where leases contain escalation clauses or concessions, such as rent holidays and landlord/tenant incentives or allowances, the impact of such adjustments is recognized on a straight-line basis over the minimum lease period. Certain leases provide for renewal options and require the payment of real estate taxes or other occupancy costs, which are also subject to escalation clauses. Net rent expense is listed in the table below.



	Years ended December 31,
	2013			2012			2011
Gross rent expense	$	366.1		$	358.5		$	369.5
Third-party sublease rental income	(16.1		)	(17.5		)	(19.4		)
Net rent expense	$	350.0		$	341.0		$	350.1

Cash amounts for future minimum lease commitments for office premises and equipment under non-cancelable leases, along with minimum sublease rental income to be received under non-cancelable subleases, are listed in the table below.



Period	Rent Obligations		Sublease Rental Income			Net Rent
2014	$	327.6	$	(17.0	)	$	310.6
2015	296.9		(8.5		)	288.4
2016	247.9		(2.6		)	245.3
2017	201.9		(0.6		)	201.3
2018	180.2		0.0			180.2
Thereafter	702.7		0.0			702.7
Total	$	1,957.2	$	(28.7	)	$	1,928.5

Guarantees

We have guaranteed certain obligations of our subsidiaries relating principally to operating leases and credit facilities of certain subsidiaries. The amount of parent company guarantees on lease obligations was $588.1 and $410.3 as of December 31, 2013 and 2012, respectively, and the amount of parent company guarantees primarily relating to credit facilities was $279.6 and $283.4 as of December 31, 2013 and 2012, respectively. In the event of non-payment by the applicable subsidiary of the obligations covered by a guarantee, we would be obligated to pay the amounts covered by that guarantee. As of December 31, 2013, there were no material assets pledged as security for such parent company guarantees.

Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2013.



	2014		2015		2016		2017		2018		Thereafter		Total
Deferred acquisition payments	$	10.2	$	23.5	$	18.9	$	20.0	$	5.9	$	0.5	$	79.0
Redeemable noncontrolling interests and call options with affiliates ¹	27.9		59.8		42.4		5.1		9.6		15.3		160.1
Total contingent acquisition payments	38.1		83.3		61.3		25.1		15.5		15.8		239.1
Less: cash compensation expense included above	0.4		0.3		0.3		0.1		0.0		0.0		1.1
Total	$	37.7	$	83.0	$	61.0	$	25.0	$	15.5	$	15.8	$	238.0

We have entered into certain acquisitions that contain both redeemable noncontrolling interests and call options with similar terms and conditions. We have certain redeemable noncontrolling interests that are exercisable at the discretion of the noncontrolling equity owners as of December 31, 2013. These estimated payments of $23.8 are included within the total payments expected to be made in 2014, and will continue to be carried forward into 2015 or beyond until exercised or expired. Redeemable noncontrolling interests are included in the table at current exercise price payable in cash, not at applicable redemption value in accordance with the authoritative guidance for classification and measurement of redeemable securities.

The estimated amounts listed would be paid in the event of exercise at the earliest exercise date. See Note 5 for further information relating to the payment structure of our acquisitions. All payments are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress.

Legal Matters

We are involved in various legal proceedings, and subject to investigations, inspections, audits, inquiries and similar actions by governmental authorities, arising in the normal course of business. We evaluate all cases each reporting period and record liabilities for losses from legal proceedings when we determine that it is probable that the outcome in a legal proceeding will be unfavorable and the amount, or potential range, of loss can be reasonably estimated. In certain cases, we cannot reasonably estimate the potential loss because, for example, the litigation is in its early stages. While any outcome related to litigation or such governmental proceedings in which we are involved cannot be predicted with certainty, management believes that the outcome of these matters, individually and in the aggregate, will not have a material adverse effect on our financial condition, results of operations or cash flows.

The entire disclosure for commitments and contingencies.

+ References+ Details

Recent Accounting Standards (Notes)	12 Months Ended
Recent Accounting Standards (Notes)	Dec. 31, 2013
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Standards	Recent Accounting Standards Comprehensive Income In February 2013, the Financial Accounting Standards Board ("FASB") issued amended guidance for presenting comprehensive income, which is effective for us January 1, 2013, and applied prospectively. This amended guidance requires an entity to disclose significant amounts reclassified out of accumulated other comprehensive income by component and their corresponding effect on the respective line items in net income. The adoption of this amended guidance required us to include additional disclosures in our Consolidated Financial Statements. See Note 10 for further information. Unrecognized Tax Benefits In July 2013, the FASB issued amended guidance on the presentation of unrecognized tax benefits when a net operating loss carryforward, a similar tax loss or a tax credit carryforward exists at the reporting date. The amended guidance requires an entity to present unrecognized tax benefits as a reduction to the deferred tax assets created by net operating losses, similar tax losses or tax credits that occur in the same taxing jurisdiction. To the extent that the unrecognized tax benefit exceeds these losses or credits, it shall be presented as a liability. We elected to adopt the guidance as of December 31, 2013. The adoption of this amended guidance did not have a significant impact on our Consolidated Financial Statements.

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

Quarterly Financial Information Disclosure [Abstract]

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-Subparagraph (SX 210.10-01.(b)(6))

-URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699

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+ Details

Results by Quarter (Unaudited) (Notes)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information

Results by Quarter (Unaudited)



	Three Months Ended March 31,						Three Months Ended June 30,						Three Months Ended September 30,						Three Months Ended December 31,
	2013			2012			2013			2012			2013			2012			2013			2012
Revenue	$	1,543.0		$	1,506.8		$	1,756.2		$	1,715.7		$	1,700.4		$	1,670.4		$	2,122.7		$	2,063.3
Salaries and related expenses	1,132.1			1,104.9			1,120.2			1,088.9			1,093.6			1,064.3			1,199.6			1,133.8
Office and general expenses	453.4			441.3			460.9			451.1			465.5			475.1			538.1			519.7
Restructuring and other reorganization-related charges (reversals), net	(0.1		)	0.0			0.3			(0.7		)	(0.2		)	(0.4		)	60.6			(0.1		)
Operating (loss) income	(42.4		)	(39.4		)	174.8			176.4			141.5			131.4			324.4			409.9
Other income (expense), net ¹	1.8			(1.3		)	4.8			4.7			(46.6		)	1.7			7.7			95.4
Total (expenses) and other income¹	(28.6		)	(25.9		)	(26.9		)	(21.3		)	(64.5		)	(23.2		)	(10.3		)	66.9
(Benefit of) provision for income taxes	(12.4		)	(19.2		)	62.0			50.1			28.4			41.9			103.2			140.5
Net (loss) income ¹	(58.5		)	(45.7		)	86.1			105.5			49.2			67.7			212.1			337.1
Net (loss) income available to IPG common stockholders ¹	$	(59.2	)	$	(45.9	)	$	79.9		$	99.0		$	45.4		$	68.7		$	193.1		$	313.3
(Loss) earnings per share available to IPG common stockholders:
Basic	$	(0.14	)	$	(0.10	)	$	0.19		$	0.23		$	0.11		$	0.16		$	0.45		$	0.74
Diluted	$	(0.14	)	$	(0.10	)	$	0.18		$	0.22		$	0.11		$	0.15		$	0.44		$	0.68

Dividends declared per common stock	$	0.075		$	0.060		$	0.075		$	0.060		$	0.075		$	0.060		$	0.075		$	0.060


¹	The three months ended September 30, 2013 include a pre-tax loss of $45.2, related to our early extinguishment of debt. The three months ended December 31, 2012 include a pre-tax gain of $93.6 related to the sale of our holdings in Facebook.

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

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Subsequent Events (Notes)	12 Months Ended
Subsequent Events (Notes)	Dec. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In February 2014, we announced that our Board had approved a new share repurchase program to repurchase from time to time up to $300.0, excluding fees, of our common stock (the "2014 share repurchase program"). The authorization for repurchases under the 2014 share repurchase program is in addition to any amounts remaining available for repurchase under the 2013 share repurchase program. See Note 6 for further information on the 2013 share repurchase program. We may effect such repurchases under the 2014 share repurchase program through open market purchases, trading plans established in accordance with SEC rules, derivative transactions or other means. The timing and amount of repurchases under the authorization will depend on market conditions and other funding requirements. There is no expiration date associated with the share repurchase programs. We also announced in February 2014, that our Board had declared a common stock cash dividend of $0.095 per share, payable on March 17, 2014 to holders of record as of the close of business on March 3, 2014.

Summary of Significant Accounting Policies Principles of Consolidation (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are accounted for under the cost method. All intercompany accounts and transactions have been eliminated in consolidation. We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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-Name Regulation S-X (SX)

-Number 210

-Section 02, 03

-Article 3A

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-Name Accounting Standards Codification

-Topic 235

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-Subparagraph (SX 210.3A-02)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph k

-Article 1

+ Details

Summary of Significant Accounting Policies Use of Estimates (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates and assumptions.

Summary of Significant Accounting Policies Revenue Recognition (Policies)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Revenue Recognition

•


•	Fees are recognized on a straight-line or monthly basis when service is provided essentially on a pro-rata basis and the terms of the contract support monthly basis accounting.

•

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

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Summary of Significant Accounting Policies Cash and Cash Equivalents (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

+ References+ Details

Summary of Significant Accounting Policies Short-Term Marketable Securities (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Short-Term Marketable Securities	Short-Term Marketable Securities Short-term marketable securities include investment-grade time deposits, commercial paper and government securities with maturities greater than three months but less than twelve months. These securities are classified as available-for-sale and are carried at fair value with net unrealized gains and losses reported as a component of accumulated other comprehensive loss, which is a component of stockholders’ equity. The cost of securities is determined based upon the average cost of the securities sold.

Disclosure of accounting policy for investments in debt and equity securities that have readily determinable fair values (marketable securities). At a minimum, the disclosure might address accounting policies for investments classified as trading, available for sale, or held to maturity and may include how the entity determines whether impairments of available for sale or held to maturity investments are other than temporary, how the fair values of the entity's securities are determined, and the entity's accounting treatment for transfers between investment categories.

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Summary of Significant Accounting Policies Allowance for Doubtful Accounts (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The allowance for doubtful accounts is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

Disclosure of accounting policy for trade and other accounts receivable, and finance, loan and lease receivables, including those classified as held for investment and held for sale. This disclosure may include (1) the basis at which such receivables are carried in the entity's statements of financial position (2) how the level of the valuation allowance for receivables is determined (3) when impairments, charge-offs or recoveries are recognized for such receivables (4) the treatment of origination fees and costs, including the amortization method for net deferred fees or costs (5) the treatment of any premiums or discounts or unearned income (6) the entity's income recognition policies for such receivables, including those that are impaired, past due or placed on nonaccrual status and (7) the treatment of foreclosures or repossessions (8) the nature and amount of any guarantees to repurchase receivables.

+ References+ Details

Summary of Significant Accounting Policies Expenditures Billable to Clients (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Expenditures Billable to Clients	Expenditures Billable to Clients Expenditures billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in expenditures billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

Disclosure of accounting policy for major classes of inventories, bases of stating inventories (for example, lower of cost or market), methods by which amounts are added and removed from inventory classes (for example, FIFO, LIFO, or average cost), loss recognition on impairment of inventories, and situations in which inventories are stated above cost. If inventory is carried at cost, this disclosure includes the nature of the cost elements included in inventory.

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Summary of Significant Accounting Policies Investments (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Investments	Investments Our investments in publicly traded companies over which we do not exert a significant influence are classified as available-for-sale. These investments are reported at fair value based on quoted market prices with net unrealized gains and losses reported as a component of accumulated other comprehensive loss. Our non-publicly traded investments and all other publicly traded investments, including investments to fund certain deferred compensation and retirement obligations, are accounted for using the equity method or cost method. We do not disclose the fair value for equity method investments or investments held at cost as it is not practical to estimate fair value since there is no readily available market data and it is cost prohibitive to obtain independent valuations. We regularly review our equity and cost method investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment. In the event a decline in fair value of an investment occurs, we determine if the decline has been other-than-temporary. We consider our investments strategic and long-term in nature, so we determine if the fair value decline is recoverable within a reasonable period. For our investments, we evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if an other-than-temporary decline in value of an investment has occurred.

Disclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.

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Summary of Significant Accounting Policies Derivatives (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Derivatives	Derivatives We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the effective portion of the changes in the fair value of the derivative is recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings.

Disclosure of accounting policy for its derivative instruments and hedging activities.

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Summary of Significant Accounting Policies Furniture, Equipment and Leasehold Improvements (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Furniture, Equipment and Leasehold Improvements	Furniture, Equipment and Leasehold Improvements Furniture, equipment and leasehold improvements are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture, equipment and computer software costs, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements.

Disclosure of accounting policy for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, basis of assets, depreciation and depletion methods used, including composite deprecation, estimated useful lives, capitalization policy, accounting treatment for costs incurred for repairs and maintenance, capitalized interest and the method it is calculated, disposals and impairments.

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Summary of Significant Accounting Policies Goodwill and Other Intangible Assets (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets. We review goodwill and other intangible assets with indefinite lives not subject to amortization as of October 1^st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 13 reporting units that were subject to the 2013 annual impairment testing. Our annual impairment review as of October 1, 2013 did not result in an impairment charge for any of our reporting units. During 2011 and 2012, we adopted new authoritative guidance for goodwill and indefinite-lived intangible assets, respectively, which permits an entity to first assess qualitative factors to determine whether it is “more likely than not” that the goodwill or indefinite-lived intangible assets are impaired. Qualitative factors to consider may include macroeconomic conditions, industry and market considerations, cost factors that may have a negative effect on earnings, financial performance, and other relevant entity-specific events such as changes in management, key personnel, strategy or clients, as well as pending litigation. If, after assessing the totality of events or circumstances such as those described above, an entity determines that it is "more likely than not" that the goodwill or indefinite-lived intangible asset is impaired, then the entity is required to determine the fair value and perform the quantitative impairment test by comparing the fair value with the carrying value. Otherwise, no additional testing is required. For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the first step of the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The first step is a comparison of the fair value of each reporting unit to its carrying value, including goodwill. The sum of the fair values of all our reporting units is reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the first step of the quantitative impairment test is failed and the magnitude of any goodwill impairment is determined under the second step, which is a comparison of the implied fair value of a reporting unit's goodwill to its carrying value. The implied fair value of goodwill is the excess of the fair value of the reporting unit over its carrying value, excluding goodwill. Impaired goodwill is written down to its implied fair value with a charge to expense in the period the impairment is identified. The fair value of a reporting unit for 2013 and 2012 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data. We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these assets. These assets are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

Summary of Significant Accounting Policies Foreign Currencies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Foreign Currencies	Foreign Currencies The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax loss of $0.6 in 2013 , a pre-tax gain of $1.2 in 2012 and a pre-tax loss $0.9 in 2011. We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country would be changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses would be recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.

+ References+ Details

Summary of Significant Accounting Policies Income Taxes (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Income Taxes	Income Taxes The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References+ Details

Summary of Significant Accounting Policies Redeemable Noncontrolling Interests (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Redeemable Noncontrolling Interests	Redeemable Noncontrolling Interests Many of our acquisitions include provisions under which the noncontrolling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable noncontrolling interests are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress. We record these redeemable noncontrolling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable noncontrolling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings or additional paid-in capital, but will not impact net income. Adjustments as a result of currency translation will affect the redeemable noncontrolling interest balance, but do not impact retained earnings or additional paid-in capital.

Disclosure of accounting policy for subsidiaries or other investments that are consolidated, including the accounting treatment for intercompany accounts or transactions and any noncontrolling interest.

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Summary of Significant Accounting Policies Earnings Per Share (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Earnings Per Share	Earnings Per Share (“EPS”) Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders adjusted to exclude, if dilutive, preferred stock dividends, interest expense related to potentially dilutive securities calculated using the effective interest rate method and the benefit from the preferred stock repurchased, divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued. Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities or debt obligations were exercised or converted into common stock. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock or “if-converted” method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized and any tax benefits credited to additional paid-in-capital related to the exercise. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation. We may be required to calculate basic EPS using the two-class method, as a result of our redeemable noncontrolling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable noncontrolling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2013, 2012 and 2011, there was no impact to EPS for adjustments related to our redeemable noncontrolling interests.

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

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Summary of Significant Accounting Policies Pension and Postretirement Benefits (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Pension and Postretirement Benefits	Pension and Postretirement Benefits We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

Summary of Carrying Amounts and Fair Values of Long-term Debt

Disclosure of accounting policy for pension and other postretirement benefit plans. This accounting policy may address (1) the types of plans sponsored by the entity, and the benefits provided by each plan (2) groups that participate in (or are covered by) each plan (3) how plan assets, liabilities and expenses are measured, including the use of any actuaries and (4) significant assumptions used by the entity to value plan assets and liabilities and how such assumptions are derived.

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Summary of Significant Accounting Policies Stock-Based Compensation (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Stock-Based Compensation	Stock-Based Compensation Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

Debt and Credit Arrangements (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

A summary of the carrying amounts and fair values of our debt is listed below.



	Effective Interest Rate		December 31,
			2013				2012
			Book Value		Fair Value ¹		Book Value		Fair Value
6.25% Senior Unsecured Notes due 2014 (less unamortized discount of $0.1)	6.29	%	$	351.3	$	365.6	$	352.8	$	372.6
2.25% Senior Notes due 2017 (less unamortized discount of $0.6)	2.30	%	299.4		293.0		299.3		297.8
4.00% Senior Notes due 2022 (less unamortized discount of $2.6)	4.13	%	247.4		241.6		247.1		258.7
3.75% Senior Notes due 2023 (less unamortized discount of $1.4)	4.32	%	498.6		467.3		498.5		499.7
10.00% Senior Unsecured Notes due 2017			0.0		0.0		591.9		660.8
4.75% Convertible Senior Notes due 2023			0.0		0.0		200.5		202.8
Other notes payable and capitalized leases			86.7		87.8		87.3		90.8
Total long-term debt			1,483.4				2,277.4
Less: current portion ²			353.6				216.6
Long-term debt, excluding current portion			$	1,129.8			$	2,060.8


¹	See Note 12 for information on the fair value measurement of our long-term debt.

Annual Maturities of Long-term Debt

Annual maturities are scheduled as follows based on the book value as of December 31, 2013.



2014	$	353.6
2015	2.2
2016	2.3
2017	301.7
2018	24.8
Thereafter	798.8
Total long-term debt	$	1,483.4

Summary of Credit Facilities

A summary of our credit facilities is presented below.



	December 31,
	2013								2012
	Total Facility		Amount Outstanding		Letters of Credit		Total Available		Total Facility		Amount Outstanding		Letters of Credit		Total Available
Committed credit agreement	$	1,000.0	$	0.0	$	14.3	$	985.7	$	1,000.0	$	0.0	$	15.1	$	984.9
Uncommitted credit agreements	$	700.2	$	179.1	$	4.2	$	516.9	$	317.2	$	172.1	$	3.3	$	141.8

Summary of Financial Covenants in Credit Agreement

December 31, 2013 and thereafter.



Interest coverage ratio (not less than): ¹		5.00x
Leverage ratio (not greater than): ²		3.25x


¹	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.


²	The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders

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+ Details

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.



	Years ended December 31,
	2013		2012		2011
Net income available to IPG common stockholders - basic	$	259.2	$	435.1	$	520.7
Adjustments: Effect of dilutive securities
Interest on 4.25% Notes ¹	0.0		0.3		1.4
Interest on 4.75% Notes ¹	0.8		4.1		4.1
Dividends on preferred stock	0.0		11.6		11.6
Net income available to IPG common stockholders - diluted	$	260.0	$	451.1	$	537.8


Weighted-average number of common shares outstanding - basic	421.1		432.5		465.5
Add: Effect of dilutive securities
Restricted stock, stock options and other equity awards	5.2		7.2		9.1
4.25% Notes ¹	0.0		7.9		33.0
4.75% Notes ¹	3.3		16.9		16.5
Preferred stock outstanding ²	0.0		16.9		16.5

Weighted-average number of common shares outstanding - diluted	429.6		481.4		540.6


Earnings per share available to IPG common stockholders - basic	$	0.62	$	1.01	$	1.12
Earnings per share available to IPG common stockholders - diluted	$	0.61	$	0.94	$	0.99


¹	We retired all of our outstanding 4.75% Notes and 4.25% Notes in March 2013 and March 2012, respectively. See Note 2 for further information. For purposes of calculating diluted earnings per share for 2013 and 2012, the potentially dilutive shares are pro-rated based on the period they were outstanding.


²	We converted all of our Series B Preferred Stock into common stock in October 2013. See Note 3 for further information. For purposes of calculating diluted earnings per share for 2013, the potentially dilutive shares would have been pro-rated based on the period they were outstanding but were antidilutive.

Potential Shares Excluded from Diluted Earnings Per Share Calculation

he following table presents the potential shares excluded from the diluted earnings per share calculation because the effect of including these potential shares would be antidilutive.



	Years ended December 31,
	2013	2012	2011
Preferred Stock Outstanding ¹	13.7	0.0	0.0
Securities excluded from the diluted earnings per share calculation because the exercise price was greater than the average market price:
Stock options ²	0.1	6.6	8.9


¹	We converted all of our Series B Preferred Stock into common stock in October 2013. See Note 3 for further information. For purposes of calculating diluted earnings per share for 2013, the potentially dilutive shares would have been pro-rated based on the period they were outstanding but were antidilutive.


²	These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

Acquisitions (Tables)

12 Months Ended

Dec. 31, 2013

Business Combinations [Abstract]

Redeemable Noncontrolling Interest

The following table presents changes in our redeemable noncontrolling interests.



	Years ended December 31,
	2013			2012			2011
Balance at beginning of period	$	227.2		$	243.4		$	291.2
Change in related noncontrolling interest balance	4.6			1.1			(7.7		)
Changes in redemption value of redeemable noncontrolling interests:
Additions	16.2			0.0			17.9
Redemptions and reclassifications	(2.3		)	(14.2		)	(70.7		)
Redemption value adjustments	3.4			(3.1		)	12.7
Balance at end of period	$	249.1		$	227.2		$	243.4

Cash Paid For Current And Prior Years' Acquisitions

Details of cash paid for current and prior years' acquisitions are listed below.



	Years ended December 31,
	2013			2012			2011
Cost of investment: current-year acquisitions	$	67.7		$	156.8		$	48.0
Cost of investment: prior-year acquisitions	28.5			40.6			105.1
Less: net cash acquired	(7.1		)	(14.8		)	(18.5		)
Total cost of investment ¹	89.1			182.6			134.6
Operating expense²	2.0			3.2			0.5

Total cash paid for acquisitions	$	91.1		$	185.8		$	135.1


²	Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.

Supplementary Data (Tables)

12 Months Ended

Dec. 31, 2013

Supplementary Data [Abstract]

Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable

Valuation and Qualifying Accounts – Allowance for Uncollectible Accounts Receivable



	Years ended December 31,
	2013			2012			2011
Balance at beginning of period	$	59.0		$	55.4		$	63.1
Charges to costs and expenses	12.6			16.3			10.4
Reversals to other accounts¹	0.7			(0.2		)	(0.5		)
Deductions:
Dispositions	0.0			(0.4		)	0.0
Uncollectible accounts written off	(7.2		)	(12.6		)	(16.3		)
Foreign currency translation adjustment	(0.2		)	0.5			(1.3		)
Balance at end of period	$	64.9		$	59.0		$	55.4


¹	Amounts primarily relate to miscellaneous other amounts and reclassifications.

Furniture, Equipment and Leasehold Improvements, net



	December 31,
	2013			2012
Furniture and equipment	$	930.7		$	932.6
Leasehold improvements	611.4			597.2
Land and buildings	109.6			109.9
	1,651.7			1,639.7
Less: accumulated depreciation	(1,111.7		)	(1,134.9		)
Total furniture, equipment and leasehold improvements, net	$	540.0		$	504.8

Accrued Liabilities

The following table presents the components of accrued liabilities.



	December 31,
	2013		2012
Salaries, benefits and related expenses	$	467.2	$	478.2
Office and related expenses	56.9		51.6
Acquisition obligations	12.8		29.5
Interest	16.0		42.4
Restructuring and other reorganization-related	46.7		3.6
Other	118.8		122.9
Total accrued liabilities	$	718.4	$	728.2

Share Repurchase Program

The following table presents our share repurchase activity under our share repurchase programs.



	Years ended December 31,
	2013		2012		2011
Number of shares repurchased	31.8		32.7		41.7
Aggregate cost, including fees	$	481.8	$	350.5	$	400.8
Average price per share, including fees	$	15.17	$	10.72	$	9.62

Other (Expense) Income, net

Results of operations include certain items that are not directly associated with our revenue-producing operations.



	Years ended December 31,
	2013			2012			2011
Loss on early extinguishment of debt	$	(45.2	)	$	0.0		$	0.0
Gains on sales of businesses and investments	1.5			88.2			125.9
Vendor discounts and credit adjustments	8.6			15.3			19.4
Other income (expense), net	2.8			(3.0		)	4.9
Total other (expense) income, net	$	(32.3	)	$	100.5		$	150.2

Supplemental Cash Flow Information



	Years ended December 31,
	2013		2012		2011
Cash paid for interest	$	110.7	$	130.6	$	138.9
Cash paid for income taxes, net of refunds ¹	111.8		95.7		102.0


¹	Refunds of $15.0, $23.5 and $25.4 were received for the years ended December 31, 2013, 2012 and 2011, respectively.

Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying value of goodwill for our segments, IAN and CMG, for the years ended December 31, 2013 and 2012 are listed below.



	IAN			CMG			Total ¹
Balance as of December 31, 2011	$	2,952.9		$	491.4		$	3,444.3
Current year acquisitions	122.0			11.7			133.7
Contingent and deferred payments for prior acquisitions	2.2			0.0			2.2
Other ²	(2.5		)	2.9			0.4
Balance as of December 31, 2012	$	3,074.6		$	506.0		$	3,580.6
Current year acquisitions	58.8			16.5			75.3
Contingent and deferred payments for prior acquisitions	0.0			0.0			0.0
Other ²	(24.1		)	(2.8		)	(26.9		)
Balance as of December 31, 2013	$	3,109.3		$	519.7		$	3,629.0


¹	For all periods presented we have not recorded a goodwill impairment charge.


²	Primarily includes foreign currency translation adjustments.

Schedule of Finite-Lived Intangible Assets by Major Class

The following table provides a summary of other intangible assets, which are included in other assets on our Consolidated Balance Sheets.



	December 31,
	2013							2012
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists	$	228.1	$	(119.8	)	$	108.3	$	184.0	$	(96.9	)	$	87.1
Trade names	64.5		(19.2		)	45.3		59.7		(15.5		)	44.2
Other	14.0		(3.8		)	10.2		15.1		(5.7		)	9.4
Total	$	306.6	$	(142.8	)	$	163.8	$	258.8	$	(118.1	)	$	140.7

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2013 is listed below.



	2014		2015		2016		2017		2018
Estimated amortization expense	$	34.6	$	34.3	$	26.8	$	10.8	$	9.5

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

The components of income before income taxes, equity earnings and the impact of noncontrolling interests are listed below.



	Years ended December 31,
	2013		2012		2011
Domestic	$	255.3	$	386.9	$	428.4
Foreign	212.7		287.9		310.0
Total	$	468.0	$	674.8	$	738.4

Schedule of Components of Provision for Income Taxes

The provision for income taxes is listed below.



	Years ended December 31,
	2013			2012			2011
U.S. federal income taxes (including foreign withholding taxes):
Current	$	46.9		$	9.4		$	0.9
Deferred	25.2			118.1			92.3
	72.1			127.5			93.2
State and local income taxes:
Current	(14.7		)	17.1			12.3
Deferred	24.7			25.3			11.3
	10.0			42.4			23.6
Foreign income taxes:
Current	79.6			83.2			93.1
Deferred	19.5			(39.8		)	(19.7		)
	99.1			43.4			73.4
Total	$	181.2		$	213.3		$	190.2

Schedule of Effective Income Tax Rate Reconciliation



	Years ended December 31,
	2013			2012			2011
U.S. federal statutory income tax rate	35.0		%	35.0		%	35.0		%

Income tax provision at U.S. federal statutory rate	$	163.8		$	236.2		$	258.4
State and local income taxes, net of federal income tax benefit	6.5			27.3			15.3
Impact of foreign operations, including withholding taxes	30.5			8.4			(21.9		)
Change in net valuation allowance ¹	3.2			(57.3		)	(32.9		)
Worthless securities deduction	(22.2		)	0.0			(23.0		)
Increases (decreases) in unrecognized tax benefits, net	0.0			24.1			(2.7		)
Other	(0.6		)	(25.4		)	(3.0		)
Provision for income taxes	$	181.2		$	213.3		$	190.2
Effective income tax rate on operations	38.7		%	31.6		%	25.8		%


¹	Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax assets and liabilities are listed below.



	December 31,
	2013			2012
Postretirement/post-employment benefits	$	32.5		$	40.4
Deferred compensation	187.2			192.4
Pension costs	31.1			27.0
Basis differences in fixed assets	(4.1		)	26.9
Rent	50.7			50.2
Interest	60.7			66.9
Accruals and reserves	39.6			51.1
Allowance for doubtful accounts	10.8			9.2
Basis differences in intangible assets	(402.2		)	(364.9		)
Investments in equity securities	48.6			(5.2		)
Tax loss/tax credit carry forwards	443.6			449.7
Restructuring and other reorganization-related costs	2.6			1.2
Other	60.5			88.3
Total deferred tax assets, net	561.6			633.2
Valuation allowance	(467.3		)	(392.9		)
Net deferred tax assets	$	94.3		$	240.3

Summary of Valuation Allowance

The change in the valuation allowance is listed below.



	Years ended December 31,
	2013		2012			2011
Balance at beginning of period	$	392.9	$	489.9		$	508.1
Charged (reversed) to costs and expenses	65.2		(49.5		)	(25.1		)
Charged (reversed) to gross tax assets and other accounts	9.2		(47.5		)	6.9
Balance at end of period	$	467.3	$	392.9		$	489.9

Schedule of Unrecognized Tax Benefits Activity

The table below summarizes the activity related to our unrecognized tax benefits.



	December 31,
	2013			2012			2011
Balance at beginning of period	$	194.6		$	161.0		$	146.7
Increases as a result of tax positions taken during a prior year	8.3			28.2			5.3
Decreases as a result of tax positions taken during a prior year	(1.9		)	(6.8		)	(18.1		)
Settlements with taxing authorities	(34.9		)	(0.7		)	(5.0		)
Lapse of statutes of limitation	(10.6		)	(1.1		)	(0.2		)
Increases as a result of tax positions taken during the current year	63.7			14.0			32.3
Balance at end of period	$	219.2		$	194.6		$	161.0

Restructuring and Other Reorganization-Related Charges (Reversals), net (Tables)

12 Months Ended

Dec. 31, 2013

Restructuring and Related Activities [Abstract]

Restructuring by Type

The components of restructuring and other reorganization-related charges (reversals), net for 2013 and prior restructuring plans are listed below.



	Years ended December 31,
	2013		2012			2011
Severance and termination costs	$	55.9	$	0.0		$	(0.1	)
Lease termination costs	4.2		(1.1		)	1.3
Other exit costs	0.5		(0.1		)	(0.2		)
Total restructuring and other reorganization-related charges (reversals), net	$	60.6	$	(1.2	)	$	1.0

2013 Restructuring Liability Activity



	2013 Restructuring Expense		Non-Cash Items			2013 Cash Payments			Foreign Currency Adjustment		Liability at December 31, 2013
Severance and termination costs	$	55.9	$	0.0		$	(10.6	)	$	1.2	$	46.5
Lease termination costs	4.8		(0.5		)	(0.4		)	0.0		3.9
Other exit costs	0.5		0.0			0.0			0.0		0.5
Total	$	61.2	$	(0.5	)	$	(11.0	)	$	1.2	$	50.9

Accumulated Other Comprehensive Loss, net of tax (Tables)

12 Months Ended

Dec. 31, 2013

Accumulated Other Comprehensive Loss [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table presents the changes in accumulated other comprehensive loss, net of tax by component.



	Foreign Currency Translation Adjustments			Available-for-Sale Securities			Derivative Instruments			Defined Benefit Pension and Other Postretirement Plans			Total
Balance as of December 31, 2011	$	(140.9	)	$	0.2		$	0.0		$	(85.0	)	$	(225.7	)
Other comprehensive income (loss) before reclassifications	10.8			0.4			(21.9		)	(70.6		)	(81.3		)
Amount reclassified from accumulated other comprehensive loss, net of tax	0.0			0.2			9.2			9.6			19.0
Balance as of December 31, 2012	$	(130.1	)	$	0.8		$	(12.7	)	$	(146.0	)	$	(288.0	)
Other comprehensive (loss) income before reclassifications	(113.0		)	0.8			0.0			(19.7		)	(131.9		)
Amount reclassified from accumulated other comprehensive loss, net of tax	(0.6		)	(1.2		)	1.0			9.5			8.7
Balance as of December 31, 2013	$	(243.7	)	$	0.4		$	(11.7	)	$	(156.2	)	$	(411.2	)

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]



	Year ended December 31, 2013			Affected Line Item in the Consolidated Statement of Operations
Foreign currency translation adjustments	$	0.0
Gains on available-for-sale securities	(1.4		)	Other (expense) income, net
Losses on derivative instruments	1.7			Interest expense
Amortization of defined benefit pension and postretirement plans items ¹	10.8
Tax effect	(2.4		)	Provision for income taxes
Total amount reclassified from accumulated other comprehensive loss, net of tax	$	8.7

Incentive Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2013

Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]

Schedule of Stock-based Compensation Expense

The amount of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statement of Operations, and the related tax benefit, are listed below.



	Years ended December 31,
	2013		2012		2011
Stock options	$	3.7	$	5.4	$	6.7
Stock-settled awards	9.8		14.9		21.9
Cash-settled awards	1.5		3.9		5.7
Performance-based awards	29.6		24.5		23.3
Employee stock purchase plan	0.6		0.6		0.7
Other ¹	0.8		1.1		4.1
Stock-based compensation expense	$	46.0	$	50.4	$	62.4
Tax benefit	$	17.6	$	19.7	$	22.1


¹	Represents charges recorded for severance expense related to stock-based compensation awards.

Schedule of Stock Options Activity

The following tables are a summary of stock option activity during 2013.



	Options		Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2013	14.1		$9.76
Granted	0.7		12.79
Exercised	(5.2	)	9.25
Cancelled/expired	(0.1	)	12.34
Forfeited	(0.1	)	5.35
Stock options outstanding as of December 31, 2013	9.4		10.24		4.4	$	70.0
Stock options vested and expected to vest as of December 31, 2013	9.4		10.24		4.4	$	69.8
Stock options exercisable as of December 31, 2013	7.9		9.92		3.6	$	61.3

	Options		Weighted- Average Grant Date Fair Value (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Non-vested as of January 1, 2013	3.9		$	3.29
Granted	0.7		4.14
Vested	(3.0	)	3.02
Forfeited	(0.1	)	3.01
Non-vested as of December 31, 2013	1.5		4.21		8.2	$	8.6

Summary of Stock Options Assumptions

The fair value of each option grant has been estimated with the following weighted-average assumptions.



	Years ended December 31,
	2013		2012		2011
Expected volatility ¹	40.2	%	43.8	%	39.9	%
Expected term (years) ²	6.9		6.8		6.7
Risk free interest rate ³	1.3	%	1.3	%	2.8	%
Expected dividend yield ⁴	2.4	%	2.1	%	1.9	%


¹	The expected volatility used to estimate the fair value of stock options awarded is based on a blend of: (i) historical volatility of our common stock for periods equal to the expected term of our stock options and (ii) implied volatility of tradable forward put and call options to purchase and sell shares of our common stock.


³	The risk free rate is determined using the implied yield currently available for zero-coupon U.S. government issuers with a remaining term equal to the expected term of the options.


⁴	The expected dividend yield is calculated based on an annualized dividend of $0.30 per share in 2013 and $0.24 per share in 2012 and 2011.

Stock-based Compensation, Grants in Period, Weighted Average Grant Date Fair Value

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2013 and 2012.



	Years ended December 31,
	2013		2012		2011
Stock-Settled Awards:
Awards granted	1.1		0.9		0.8
Weighted-average grant-date fair value (per award)	$	13.51	$	11.43	$	11.94
Total fair value of vested awards distributed	$	35.4	$	63.5	$	63.1
Cash-Settled Awards:
Awards granted	0.1		0.1		0.0
Weighted-average grant-date fair value (per award)	$	16.35	$	10.94	$	8.96
Total fair value of vested awards distributed	$	5.4	$	11.1	$	10.4
Performance-Based Awards:
Awards granted	1.5		1.8		1.8
Weighted-average grant-date fair value (per award)	$	11.97	$	10.61	$	11.58
Total fair value of vested awards distributed	$	17.7	$	11.5	$	30.8

Schedule of Nonvested Stock Activity



	Stock-Settled Awards					Cash-Settled Awards					Performance-Based Awards
	Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2013	3.8			$	9.55	0.5			$	8.62	2.7			$	11.57
Granted	1.1			13.51		0.1			16.35		1.5			11.97
Vested	(2.8		)	8.98		(0.4		)	8.52		0.0			9.93
Forfeited	(0.2		)	10.40		(0.1		)	14.18		(0.1		)	11.91
Non-vested as of December 31, 2013	1.9			12.54		0.1			12.03		4.1			11.71
Total unrecognized compensation expense remaining	$	8.6				$	1.0				$	16.7
Weighted-average years expected to be recognized over	1.7					1.8					1.9

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value of Pension Plan Assets



	December 31, 2013								December 31, 2012
Asset Class	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Investment funds	$	22.2	$	359.1	$	25.4	$	406.7	$	22.3	$	327.9	$	48.2	$	398.4
Insurance contracts	0.0		22.0		0.0		22.0		0.0		24.8		0.0		24.8
Limited partnerships	0.0		0.0		36.1		36.1		0.0		0.0		39.8		39.8
Other	40.2		2.5		0.6		43.3		28.6		5.5		0.3		34.4
Total	$	62.4	$	383.6	$	62.1	$	508.1	$	50.9	$	358.2	$	88.3	$	497.4

Assets and liabilities measured at fair value on a recurring basis



	December 31, 2013												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	761.2		$	0.0		$	0.0		$	761.2		Cash and cash equivalents
Short-term marketable securities	5.3			0.0			0.0			5.3			Marketable securities
Long-term investments	1.6			0.0			0.0			1.6			Other assets
Total	$	768.1		$	0.0		$	0.0		$	768.1

As a percentage of total assets	6.0		%	0.0		%	0.0		%	6.0		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	27.0		$	27.0

	December 31, 2012												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	1,806.6		$	0.0		$	0.0		$	1,806.6		Cash and cash equivalents
Short-term marketable securities	16.0			0.0			0.0			16.0			Marketable securities
Long-term investments	1.5			0.0			0.0			1.5			Other assets
Total	$	1,824.1		$	0.0		$	0.0		$	1,824.1

As a percentage of total assets	13.5		%	0.0		%	0.0		%	13.5		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	25.3		$	25.3

Assets and liabilities measured at fair value on recurring basis - level 3 reconciliation

The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which we utilize Level 3 inputs to determine fair value.



	Years ended December 31,
Liabilities	2013		2012
Mandatorily redeemable noncontrolling interests - Balance at beginning of period	$	25.3	$	58.9
Level 3 additions	0.2		0.0
Level 3 reductions	0.0		(34.9		)
Realized losses included in net income	1.5		1.4
Foreign currency translation	0.0		(0.1		)
Mandatorily redeemable noncontrolling interests - Balance at end of period	$	27.0	$	25.3

Assets and liabilities measured at fair value on a nonrecurring



	December 31, 2013
	Level 1		Level 2		Level 3		Total
Total long-term debt	$	0.0	$	1,367.5	$	87.2	$	1,454.7

(Tables)

12 Months Ended

Dec. 31, 2013

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2013			2012			2013			2012			2013			2012
Benefit Obligation
Projected benefit obligation as of January 1	$	140.6		$	129.0		$	532.4		$	456.6		$	46.6		$	50.8
Service cost	0.0			0.0			9.9			10.2			0.1			0.2
Interest cost	5.5			6.3			21.7			21.9			1.6			2.3
Benefits paid	(10.4		)	(10.8		)	(23.8		)	(20.4		)	(6.4		)	(5.9		)
Plan participant contributions	0.0			0.0			0.5			0.6			1.7			1.7
Actuarial (gains) losses	(2.6		)	16.1			25.0			60.0			(5.7		)	(2.5		)
Settlements and curtailments	0.0			0.0			(3.1		)	(6.5		)	0.0			0.0
Foreign currency effect	0.0			0.0			8.1			8.9			0.0			0.0
Other	0.0			0.0			(0.8		)	1.1			0.0			0.0

Projected benefit obligation as of December 31	$	133.1		$	140.6		$	569.9		$	532.4		$	37.9		$	46.6

Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	115.7		$	107.2		$	381.7		$	363.6		$	0.0		$	0.0
Actual return on plan assets	3.8			13.7			19.5			17.6			0.0			0.0
Employer contributions	0.5			5.6			18.3			17.7			4.7			4.2
Plan participant contributions	0.0			0.0			0.5			0.6			1.7			1.7
Benefits paid	(10.4		)	(10.8		)	(23.8		)	(20.4		)	(6.4		)	(5.9		)
Settlements	0.0			0.0			(2.7		)	(6.1		)	0.0			0.0
Foreign currency effect	0.0			0.0			5.0			8.7			0.0			0.0
																0.0
Fair value of plan assets as of December 31	$	109.6		$	115.7		$	398.5		$	381.7		$	0.0		$	0.0

Funded status of the plans at December 31	$	(23.5	)	$	(24.9	)	$	(171.4	)	$	(150.7	)	$	(37.9	)	$	(46.6	)



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2013			2012			2013			2012			2013			2012
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0		$	0.0		$	8.0		$	7.4		$	0.0		$	0.0
Current liability	0.0			0.0			(7.6		)	(8.4		)	(4.2		)	(4.6		)
Non-current liability	(23.5		)	(24.9		)	(171.8		)	(149.7		)	(33.7		)	(42.0		)

Net liability recognized	$	(23.5	)	$	(24.9	)	$	(171.4	)	$	(150.7	)	$	(37.9	)	$	(46.6	)

Accumulated benefit obligation	$	133.1		$	140.6		$	540.9		$	508.5

Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss (gain)	$	47.0		$	53.6		$	141.0		$	115.7		$	(1.5	)	$	4.2
Prior service cost (credit)	0.0			0.0			1.5			1.8			(0.1		)	(0.2		)
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.0

Total amount recognized	$	47.0		$	53.6		$	142.5		$	117.5		$	(1.6	)	$	4.0



	Domestic Pension Plan				Foreign Pension Plans
December 31,	2013		2012		2013		2012
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	$	133.1	$	140.6	$	553.2	$	515.8
Aggregate accumulated benefit obligation	133.1		140.6		528.7		497.3
Aggregate fair value of plan assets	109.6		115.7		374.7		358.5

Schedule of Net Benefit Costs

The components of net periodic benefit cost and key assumptions are listed below.



	Domestic Pension Plan									Foreign Pension Plans									Domestic Postretirement Benefit Plan
Years ended December 31,	2013			2012			2011			2013			2012			2011			2013			2012			2011
Service cost	$	0.0		$	0.0		$	0.0		$	9.9		$	10.2		$	9.6		$	0.1		$	0.2		$	0.2
Interest cost	5.5			6.3			6.8			21.7			21.9			23.3			1.6			2.3			2.7
Expected return on plan assets	(7.7		)	(7.7		)	(7.5		)	(19.2		)	(18.2		)	(19.0		)	0.0			0.0			0.0
Settlement and curtailment (gains) losses	0.0			0.0			0.0			(0.1		)	0.7			0.0			0.0			0.0			0.0
Amortization of:
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.0			0.0			0.2			0.1
Prior service cost (credit)	0.0			0.0			0.0			0.2			0.2			0.2			(0.1		)	(0.1		)	(0.1		)
Unrecognized actuarial losses	7.9			6.4			6.6			2.8			1.0			0.7			0.0			0.0			0.0
Net periodic cost	$	5.7		$	5.0		$	5.9		$	15.3		$	15.8		$	14.8		$	1.6		$	2.6		$	2.9

Assumptions



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2013		2012		2011		2013		2012		2011		2013		2012		2011
Net periodic cost
Discount rate	4.00	%	5.00	%	5.50	%	4.32	%	5.00	%	5.45	%	4.00	%	5.00	%	5.50	%
Rate of compensation increase	N/A		N/A		N/A		3.57	%	3.66	%	4.37	%	N/A		N/A		N/A
Expected return on plan assets	7.00	%	7.25	%	7.50	%	5.24	%	5.02	%	5.88	%	N/A		N/A		N/A
Benefit obligation
Discount rate	4.85	%	4.00	%	5.00	%	4.29	%	4.32	%	5.00	%	4.85	%	4.00	%	5.00	%
Rate of compensation increase	N/A		N/A		N/A		3.97	%	3.57	%	3.66	%	N/A		N/A		N/A
Health care cost trend rate assumed for next year
Initial rate (weighted-average)													7.50	%	8.00	%	8.00	%
Year ultimate rate is reached													2019		2019		2016
Ultimate rate													5.00	%	5.00	%	5.50	%

Fair Value of Pension Plan Assets



	December 31, 2013								December 31, 2012
Asset Class	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Investment funds	$	22.2	$	359.1	$	25.4	$	406.7	$	22.3	$	327.9	$	48.2	$	398.4
Insurance contracts	0.0		22.0		0.0		22.0		0.0		24.8		0.0		24.8
Limited partnerships	0.0		0.0		36.1		36.1		0.0		0.0		39.8		39.8
Other	40.2		2.5		0.6		43.3		28.6		5.5		0.3		34.4
Total	$	62.4	$	383.6	$	62.1	$	508.1	$	50.9	$	358.2	$	88.3	$	497.4

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets

The following table presents additional information about our domestic and foreign pension plan assets for which we utilize Level 3 inputs to determine fair value.



	Year ended December 31, 2013											Year ended December 31, 2012
	Investment Funds			Limited Partnerships			Other		Total			Investment Funds		Limited Partnerships			Other		Total
Balance at beginning of period	$	48.2		$	39.8		$	0.3	$	88.3		$	43.8	$	41.1		$	0.1	$	85.0
Actual return on assets:
Assets sold during the year	0.6			0.0			0.0		0.6			0.0		0.0			0.0		0.0
Assets still held at year end	1.9			(2.9		)	0.2		(0.8		)	2.2		(1.3		)	0.0		0.9
Net purchases, sales and settlements	(25.3		)	(0.8		)	0.1		(26.0		)	2.2		0.0			0.2		2.4
Balance at end of period	$	25.4		$	36.1		$	0.6	$	62.1		$	48.2	$	39.8		$	0.3	$	88.3

Schedule of Allocation of Plan Assets

As of December 31, 2013, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.



			December 31,
Asset Class	2014 Target Allocation		2013		2012
Equity securities	24	%	24	%	22	%
Fixed income securities	47	%	43	%	44	%
Real estate	7	%	5	%	5	%
Other	22	%	28	%	29	%
Total	100	%	100	%	100	%

Schedule of Estimated Future Benefit Payments

The following estimated future benefit payments, which reflect future service, as appropriate, are expected to be paid in the years indicated below.



Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2014	$	10.7	$	22.1	$	4.6
2015	10.4		24.2		4.5
2016	10.1		25.4		4.3
2017	9.9		25.1		4.1
2018	9.6		26.5		3.9
2019 - 2023	44.3		151.4		15.8

Schedule of Federal Subsidies

The following federal subsidies are expected to be received in the years indicated below.



Years	Domestic Postretirement Benefit Plan
2014	$	0.4
2015	0.4
2016	0.4
2017	0.5
2018	0.5
2019 - 2023	1.6

Schedule of Segment Reporting Information, by Segment

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References+ Details

Segment Information (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Summarized financial information concerning our reportable segments is shown in the following table.



	Years ended December 31,
	2013			2012			2011
Revenue:
IAN	$	5,795.6		$	5,728.5		$	5,891.8
CMG	1,326.7			1,227.7			1,122.8
Total	$	7,122.3		$	6,956.2		$	7,014.6

Segment operating income:
IAN	$	662.1		$	700.2		$	728.8
CMG	137.6			114.2			101.4
Corporate and other	(140.8		)	(137.3		)	(142.0		)
Total	658.9			677.1			688.2

Restructuring and other reorganization-related (charges) reversals, net	(60.6		)	1.2			(1.0		)
Interest expense	(122.7		)	(133.5		)	(136.8		)
Interest income	24.7			29.5			37.8
Other (expense) income, net	(32.3		)	100.5			150.2
Income before income taxes	$	468.0		$	674.8		$	738.4

Depreciation and amortization of fixed assets and intangible assets:
IAN	$	126.0		$	119.7		$	125.7
CMG	15.6			14.4			12.8
Corporate and other	15.8			13.6			12.4
Total	$	157.4		$	147.7		$	150.9

Capital expenditures:
IAN	$	109.0		$	97.5		$	94.1
CMG	18.5			26.7			16.9
Corporate and other	45.5			45.0			29.3
Total	$	173.0		$	169.2		$	140.3

	December 31,
	2013			2012
Total assets:
IAN	$	11,425.1		$	11,035.3
CMG	1,203.8			1,073.1
Corporate and other	276.1			1,385.5
Total	$	12,905.0		$	13,493.9

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

Revenue and long-lived assets, excluding intangible assets, are presented by major geographic area in the following table.



	Revenue						Long-Lived Assets
	Years ended December 31,						December 31,
	2013		2012		2011		2013		2012
Domestic	$	3,972.6	$	3,803.6	$	3,887.7	$	545.7	$	502.5
International:
United Kingdom	568.3		572.0		539.4		60.8		64.3
Continental Europe	800.6		823.1		908.9		79.6		76.0
Asia Pacific	868.9		838.1		741.7		88.8		88.0
Latin America	464.5		450.1		444.4		72.3		70.5
Other	447.4		469.3		492.5		37.1		38.8
Total International	3,149.7		3,152.6		3,126.9		338.6		337.6
Total Consolidated	$	7,122.3	$	6,956.2	$	7,014.6	$	884.3	$	840.1

Commitments and Contingencies Disclosure [Abstract]

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References+ Details

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Net Rent Expense

Net rent expense is listed in the table below.



	Years ended December 31,
	2013			2012			2011
Gross rent expense	$	366.1		$	358.5		$	369.5
Third-party sublease rental income	(16.1		)	(17.5		)	(19.4		)
Net rent expense	$	350.0		$	341.0		$	350.1

Schedule of Future Minimum Lease Commitments



Period	Rent Obligations		Sublease Rental Income			Net Rent
2014	$	327.6	$	(17.0	)	$	310.6
2015	296.9		(8.5		)	288.4
2016	247.9		(2.6		)	245.3
2017	201.9		(0.6		)	201.3
2018	180.2		0.0			180.2
Thereafter	702.7		0.0			702.7
Total	$	1,957.2	$	(28.7	)	$	1,928.5

Schedule of Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2013.



	2014		2015		2016		2017		2018		Thereafter		Total
Deferred acquisition payments	$	10.2	$	23.5	$	18.9	$	20.0	$	5.9	$	0.5	$	79.0
Redeemable noncontrolling interests and call options with affiliates ¹	27.9		59.8		42.4		5.1		9.6		15.3		160.1
Total contingent acquisition payments	38.1		83.3		61.3		25.1		15.5		15.8		239.1
Less: cash compensation expense included above	0.4		0.3		0.3		0.1		0.0		0.0		1.1
Total	$	37.7	$	83.0	$	61.0	$	25.0	$	15.5	$	15.8	$	238.0

Results by Quarter (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Results by Quarter (Unaudited)



	Three Months Ended March 31,						Three Months Ended June 30,						Three Months Ended September 30,						Three Months Ended December 31,
	2013			2012			2013			2012			2013			2012			2013			2012
Revenue	$	1,543.0		$	1,506.8		$	1,756.2		$	1,715.7		$	1,700.4		$	1,670.4		$	2,122.7		$	2,063.3
Salaries and related expenses	1,132.1			1,104.9			1,120.2			1,088.9			1,093.6			1,064.3			1,199.6			1,133.8
Office and general expenses	453.4			441.3			460.9			451.1			465.5			475.1			538.1			519.7
Restructuring and other reorganization-related charges (reversals), net	(0.1		)	0.0			0.3			(0.7		)	(0.2		)	(0.4		)	60.6			(0.1		)
Operating (loss) income	(42.4		)	(39.4		)	174.8			176.4			141.5			131.4			324.4			409.9
Other income (expense), net ¹	1.8			(1.3		)	4.8			4.7			(46.6		)	1.7			7.7			95.4
Total (expenses) and other income¹	(28.6		)	(25.9		)	(26.9		)	(21.3		)	(64.5		)	(23.2		)	(10.3		)	66.9
(Benefit of) provision for income taxes	(12.4		)	(19.2		)	62.0			50.1			28.4			41.9			103.2			140.5
Net (loss) income ¹	(58.5		)	(45.7		)	86.1			105.5			49.2			67.7			212.1			337.1
Net (loss) income available to IPG common stockholders ¹	$	(59.2	)	$	(45.9	)	$	79.9		$	99.0		$	45.4		$	68.7		$	193.1		$	313.3
(Loss) earnings per share available to IPG common stockholders:
Basic	$	(0.14	)	$	(0.10	)	$	0.19		$	0.23		$	0.11		$	0.16		$	0.45		$	0.74
Diluted	$	(0.14	)	$	(0.10	)	$	0.18		$	0.22		$	0.11		$	0.15		$	0.44		$	0.68

Dividends declared per common stock	$	0.075		$	0.060		$	0.075		$	0.060		$	0.075		$	0.060		$	0.075		$	0.060

^[1]

[1]	The three months ended September 30, 2013 include a pre-tax loss of $45.2, related to our early extinguishment of debt. The three months ended December 31, 2012 include a pre-tax gain of $93.6 related to the sale of our holdings in Facebook.

(Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
(Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Leasehold improvements, useful life	the shorter of the useful life or the remaining lease term
Number of Reporting Units for Purposes of Annual Goodwill Impairment Test	13
Foreign currency transaction pre-tax loss	$ 0.6	$ 1.2	$ 0.9
Minimum
Buildings, useful life	10 years
Furniture, equipment and computer software costs, useful life minimum	3 years
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum
Buildings, useful life	35 years
Furniture, equipment and computer software costs, useful life minimum	7 years
Finite-Lived Intangible Asset, Useful Life	15 years

Long-term Debt (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

6.25% Senior Unsecured Notes due 2014

Dec. 31, 2012

6.25% Senior Unsecured Notes due 2014

Jul. 31, 2013

10.00% Senior Unsecured Notes due 2017

Dec. 31, 2013

10.00% Senior Unsecured Notes due 2017

Dec. 31, 2012

10.00% Senior Unsecured Notes due 2017

Dec. 31, 2013

2.25% Senior Notes due 2017

Dec. 31, 2012

2.25% Senior Notes due 2017

Nov. 08, 2012

2.25% Senior Notes due 2017

Dec. 31, 2013

4.00% Senior Notes due 2022

Dec. 31, 2012

4.00% Senior Notes due 2022

Mar. 02, 2012

4.00% Senior Notes due 2022

Dec. 31, 2013

3.75% Senior Notes due 2023

Dec. 31, 2012

3.75% Senior Notes due 2023

Nov. 08, 2012

3.75% Senior Notes due 2023

Dec. 31, 2013

4.75% Convertible Senior Notes due 2023

Dec. 31, 2012

4.75% Convertible Senior Notes due 2023

Dec. 31, 2013

4.25% Convertible Senior Notes due 2023

Dec. 31, 2013

Other notes payable and capitalized leases

Dec. 31, 2012

Other notes payable and capitalized leases

Debt Instrument

Write off of Unamortized Discount

$ 7.3

Effective Interest Rate

6.29%

2.30%

4.13%

4.32%

Stated Interest Rate

6.25%

10.00%

2.25%

4.00%

3.75%

4.75%

4.25%

Book Value

351.3

352.8

299.4

299.3

247.4

247.1

498.6

498.5

591.9

200.5

86.7

87.3

Fair Value

365.6

^[1]

372.6

293.0

^[1]

297.8

241.6

^[1]

258.7

467.3

^[1]

499.7

^[1]

660.8

^[1]

202.8

87.8

^[1]

90.8

Total long-term debt

1,483.4

2,277.4

Less: current portion

353.6

^[2]

216.6

^[2]

Long-term debt, excluding current portion

1,129.8

2,060.8

Face Value

300.0

250.0

500.0

Debt Maturity Date

Nov. 15, 2014

Jul. 15, 2017

Nov. 15, 2017

Mar. 15, 2022

Feb. 15, 2023

Mar. 15, 2023

Redemption of Convertible Notes for cash, date

Jul. 15, 2013

Unamortized Discount

$ 0.7

$ 3.2

$ 1.5

[1]

See Note 12 for information on the fair value measurement of our long-term debt.

[2]

Debt and Credit Arrangements Annual Maturities (Details) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Maturities of Long-term Debt [Abstract]

2013

$ 353.6

^[1]

2.2

2.3

301.7

24.8

798.8

$ 1,483.4

$ 2,277.4

[1]	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References+ Details

Debt and Credit Arrangements Convertible Debt (Details) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 4.75% Convertible Senior Notes due 2023	Mar. 15, 2013 4.75% Convertible Senior Notes due 2023	Mar. 31, 2012 4.25% Convertible Senior Notes due 2023	Mar. 15, 2012 4.25% Convertible Senior Notes due 2023
Debt Conversion [Line Items]
Extinguishment of Debt, Amount		$ 200,000,000		$ 400,000,000
Debt Instrument, Convertible, Conversion Price					$ 82,461,200
Debt Conversion, Converted Instrument, Amount				400,000
Debt Instrument, Convertible, Convertible Shares Eliminated due to Retirement					33,000,000
Debt Instrument, Convertible, Conversion Ratio		84.3402
RedemptionOfConvertibleNotesforCash			$ 199,997,000		$ 399,600,000
Debt Conversion, Converted Instrument, Shares Issued				30,000
Stock Issued During Period, Shares, Conversion of Convertible Securities	17,300,000	16,900,000

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References+ Details

Interest coverage ratio (not less than):

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References+ Details

Debt and Credit Arrangements Debt Extinguishment (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013 10.00% Senior Unsecured Notes due 2017	Dec. 31, 2013 10.00% Senior Unsecured Notes due 2017	Dec. 31, 2013 10.00% Senior Unsecured Notes due 2017
Extinguishment of Debt [Line Items]
Loss on Extinguishment of Debt	$ (45.2)	$ 0	$ 0	$ 45.2
Extinguishment of Debt, Amount						600.0
Write off of Unamortized Discount						7.3
Write off of Deferred Debt Issuance Cost					7.9
Redemption Premium					30.0
Early Repayment of Senior Debt						$ 630.0

Debt and Credit Arrangements Interest Rate Swaps (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	$ 300.0
Ending date hedged in interest rate cash flow hedge	Dec. 31, 2013
Cash paid to settle interest rate swap agreements	24.0
Derivative Instruments, Loss Recognized in Income, Net	2.1
Interest Rate Cash Flow Hedge Liability at Fair Value	21.9
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion, Net	(1.0)	(9.2)
Cash Flow Hedge Loss to be Reclassified within Twelve Months	(1.8)
10.00% Senior Unsecured Notes due 2017
Debt Instrument
Write off of Unamortized Discount	$ 7.3
Stated Interest Rate	10.00%
3.75% Senior Notes due 2023
Debt Instrument
Stated Interest Rate	3.75%

Credit Facility (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 12, 2013	Dec. 31, 2013 Committed credit agreement	Dec. 31, 2012 Committed credit agreement	Dec. 31, 2013 Uncommitted credit facility	Dec. 31, 2012 Uncommitted credit facility
Line of Credit Facility [Line Items]
Credit Facilities, total facility	$ 1,000.0		$ 1,000.0	$ 1,000.0	$ 700.2	$ 317.2
Credit Facilities, amount outstanding			0	0	179.1	172.1
Credit Facilities, letters of credit			14.3	15.1	4.2	3.3
Credit Facilities, total available			985.7	984.9	516.9	141.8
Line of Credit Facility Weighted Average Interest Rate					4.00%	4.00%
Line of Credit Facility Amendment Date		12/12/2013
Credit Agreement, expiration date	Dec. 12, 2018
Line of Credit Facility Commitment Increase	250.0
Credit Agreement, limit on letters of credit	$ 200.0
Credit Agreement, margin for base rate advances	0.275%
Credit Agreement, margin for Eurocurrency rate advances	1.275%
Credit Agreement, annual rate for fronting fees accrued on letters of credit	0.25%
Credit Agreement, facility fee annual rate	0.225%

Financial Covenants (Details)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

5.00x

^[1]

Leverage ratio (not greater than):

3.25x

^[2]

[1]	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.
[2]	The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Debt and Credit Arrangements Debt Narrative (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 10.00% Senior Unsecured Notes due 2017	Nov. 30, 2012 2.25% Senior Notes due 2017	Dec. 31, 2013 2.25% Senior Notes due 2017	Nov. 08, 2012 2.25% Senior Notes due 2017	Nov. 30, 2012 3.75% Senior Notes due 2023	Dec. 31, 2013 3.75% Senior Notes due 2023	Nov. 08, 2012 3.75% Senior Notes due 2023	Mar. 31, 2012 4.00% Senior Notes due 2022	Dec. 31, 2013 4.00% Senior Notes due 2022	Mar. 02, 2012 4.00% Senior Notes due 2022	Mar. 31, 2012 4.25% Convertible Senior Notes due 2023	Dec. 31, 2013 4.25% Convertible Senior Notes due 2023	Dec. 31, 2013 ERROR in label resolution.	Dec. 31, 2012 ERROR in label resolution.
Debt Instrument
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		$ 1.7	$ 0.3	$ 0
Line of Credit Facility Weighted Average Interest Rate																	4.00%	4.00%
Early Repayment of Senior Debt					630.0
Debt Instrument, Frequency of Periodic Payment							semi-annually			semi-annually			semi-annually
Repurchase Price Percentage Due to Change of Control							101.00%			101.00%			101.00%
Long-term Debt, Fair Value								299.3			498.5			246.8
Unamortized debt issuance costs		15.4	27.5					2.1			3.8			2.5
Cash debt pooling arrangements, amount netted		1,415.3	1,166.3
Exercised Call Option, Shares, Acquired, Net Share Settlement		1.5
Interest Expense, Debt															$ 0.5
Debt Maturity Date					Jul. 15, 2017		Nov. 15, 2017			Feb. 15, 2023			Mar. 15, 2022			Mar. 15, 2023
Debt Instrument, Issuance Date						Nov. 08, 2012			Nov. 08, 2012			Mar. 02, 2012
Debt Instrument, Repurchase Date	Mar. 15, 2012

Convertible Preferred Stock (Details) (USD $)	12 Months Ended
Convertible Preferred Stock (Details) (USD $)	Dec. 31, 2013	Oct. 17, 2013	Dec. 31, 2012
Features of Convertible Preferred Stock [Abstract]
Convertible preferred stock, interest rate, stated percentage	5.25%
Liquidation preference per share	$ 1,000
Conversion of Preferred Stock to Common Stock, Date	Oct. 17, 2013
Shares outstanding (actual number)	0	0	0
Conversion rate per share		77.8966
Stock Issued During Period, Shares, Conversion of Convertible Securities	17,300,000
Dividends, Preferred Stock	$ 11.6
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 52.50

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

+ References+ Details

Net income available to IPG common stockholders - basic

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References+ Details

Earnings Per Share Basic and Diluted (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

$ 193.1

$ 45.4

^[1]

$ 79.9

$ (59.2)

$ 313.3

^[1]

$ 68.7

$ 99.0

$ (45.9)

$ 259.2

$ 435.1

$ 520.7

Dividends on preferred stock

11.6

Net income available to IPG common stockholders - diluted

260.0

451.1

537.8

Weighted-average number of common shares outstanding - basic

421.1

432.5

465.5

Restricted stock, stock options and other equity awards

5.2

7.2

9.1

Preferred stock outstanding 2

^[2]

16.9

16.5

Weighted-average number of common shares outstanding - diluted

429.6

481.4

540.6

Earnings per share available to IPG common stockholders - basic

$ 0.45

$ 0.11

$ 0.19

$ (0.14)

$ 0.74

$ 0.16

$ 0.23

$ (0.10)

$ 0.62

$ 1.01

$ 1.12

Earnings per share available to IPG common stockholders - diluted

$ 0.44

$ 0.11

$ 0.18

$ (0.14)

$ 0.68

$ 0.15

$ 0.22

$ (0.10)

$ 0.61

$ 0.94

$ 0.99

4.25% Convertible Senior Notes due 2023

Interest on convertible debt

^[3]

0.3

^[3]

1.4

Convertible debt securities

^[3]

7.9

^[3]

33.0

4.75% Convertible Senior Notes due 2023

Interest on convertible debt

$ 0.8

^[3]

$ 4.1

^[3]

$ 4.1

Convertible debt securities

3.3

^[3]

16.9

^[3]

16.5

[1]	The three months ended September 30, 2013 include a pre-tax loss of $45.2, related to our early extinguishment of debt. The three months ended December 31, 2012 include a pre-tax gain of $93.6 related to the sale of our holdings in Facebook.
[2]	We converted all of our Series B Preferred Stock into common stock in October 2013. See Note 3 for further information. For purposes of calculating diluted earnings per share for 2013, the potentially dilutive shares would have been pro-rated based on the period they were outstanding but were antidilutive.
[3]	We retired all of our outstanding 4.75% Notes and 4.25% Notes in March 2013 and March 2012, respectively. See Note 2 for further information. For purposes of calculating diluted earnings per share for 2013 and 2012, the potentially dilutive shares are pro-rated based on the period they were outstanding.

Antidilutive Shares (Details)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Preferred Stock Outstanding [Member]

Antidilutive Securities

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

13.7

^[1]

Stock options

Antidilutive Securities

Stock options 2

0.1

^[2]

6.6

^[2]

8.9

^[2]

[1]	1We converted all of our Series B Preferred Stock into common stock in October 2013. See Note 3 for further information. For purposes of calculating diluted earnings per share for 2013, the potentially dilutive shares would have been pro-rated based on the period they were outstanding but were antidilutive.
[2]	2 These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References+ Details

Redeemable Noncontrolling Interests (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Redeemable Noncontrolling Interests
Balance at beginning of period	$ 227.2	$ 243.4	$ 291.2
Change in related noncontrolling interest balance	4.6	1.1	(7.7)
Changes in redemption value of redeemable noncontrolling interests:
Additions	16.2	0	17.9
Redemptions and reclassifications	(2.3)	(14.2)	(70.7)
Redemption value adjustments	3.4	(3.1)	12.7
Balance at end of period	$ 249.1	$ 227.2	$ 243.4

Number of completed acquisitions

The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

+ References+ Details

Acquisitions (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Business Combinations

Business Combination, Recognized Identifiable Goodwill and Liabilities Acquired, Net

$ 97.0

$ 201.0

Goodwill, Purchase Accounting Adjustments

^[1]

2.2

^[1]

133.0

IAN

Business Combinations

Number of completed acquisitions

CMG

Business Combinations

Number of completed acquisitions

Goodwill, Purchase Accounting Adjustments

$ 0

^[1]

$ 0

^[1]

[1]	For all periods presented we have not recorded a goodwill impairment charge.

Cash Paid for Acquisitions (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Business Acquisitions

Total cash paid for acquisitions

$ 89.1

^[1]

$ 182.6

^[1]

$ 134.6

^[1]

Less: net cash acquired

(7.1)

(14.8)

(18.5)

Operating expense

2.0

^[2]

3.2

^[2]

0.5

^[2]

Acquisition-related payments

(27.6)

(37.1)

(71.5)

Acquisitions, including deferred payments, net of cash acquired

(61.5)

(145.5)

(63.1)

PaymentsToAcquireBusinessesGrossLessOperatingExpense s

91.1

185.8

135.1

Cost of investment: current-year acquisitions

Business Acquisitions

Total cash paid for acquisitions

67.7

156.8

48.0

Cost of investment: prior-year acquisitions

Business Acquisitions

Total cash paid for acquisitions

$ 28.5

$ 40.6

$ 105.1

[1]

[2]

Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.

Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Movement in Valuation Allowances and Reserves [Roll Forward]

Balance at beginning of period

$ 59.0

$ 55.4

$ (63.1)

Charges to costs and expenses

12.6

16.3

10.4

Reversals to other accounts

0.7

^[1]

(0.2)

^[1]

(0.5)

^[1]

Deductions:

Dispositions

(0.4)

Uncollectible accounts written off

(7.2)

(12.6)

(16.3)

Foreign currency translation adjustment

(0.2)

0.5

(1.3)

Balance at end of period

$ 64.9

$ 59.0

$ 55.4

[1]	Amounts primarily relate to miscellaneous other amounts and reclassifications.

Furniture, Equipment and Leasehold Improvements, net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]
Furniture and equipment	$ 930.7	$ 932.6
Leasehold improvements	611.4	597.2
Land and buildings	109.6	109.9
Furniture, equipment and leasehold improvements	1,651.7	1,639.7
Less: Accumulated depreciation	(1,111.7)	(1,134.9)
Total furniture, equipment and leasehold improvements, net	540.0	504.8
Depreciation and amortization expense	$ 130.6	$ 124.3	$ 130.7

Accrued Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities [Abstract]
Salaries, benefits and related expenses	$ 467.2	$ 478.2
Office and related expenses	56.9	51.6
Acquisition Obligations, current	12.8	29.5
Interest	16.0	42.4
Restructuring Reserve, Current	46.7	3.6
Other	118.8	122.9
Total accrued liabilities	$ 718.4	$ 728.2

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Loss on Extinguishment of Debt

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Other (Expense) Income, Net (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

$ (45.2)

$ 0

Gains on sales of businesses and investments

1.5

88.2

125.9

Vendor discounts and credit adjustments

8.6

15.3

19.4

Other income (expense), net

2.8

(3.0)

4.9

Total other (expense) income, net

7.7

(46.6)

^[1]

4.8

1.8

95.4

^[1]

1.7

4.7

(1.3)

(32.3)

100.5

150.2

Gain on sale of portion of Facebook

$ 93.6

10.00% Senior Unsecured Notes due 2017

Stated Interest Rate

10.00%

[1]	The three months ended September 30, 2013 include a pre-tax loss of $45.2, related to our early extinguishment of debt. The three months ended December 31, 2012 include a pre-tax gain of $93.6 related to the sale of our holdings in Facebook.

Share Repurchase Program (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Number of shares repurchased	31.8	32.7
Aggregated cost, including fees	$ 481.8	$ 350.5	$ 400.8
Average price per share, including fees	$ 15.17	$ 10.72
2013 Share Repurchase Program
Share repurchase program, initial authorized amount	300.0
Share repurchase program, increased authorized amount	500.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	118.6
2012 Share Repurchase Program
Share repurchase program, initial authorized amount	300.0
Share repurchase program, increased authorized amount	$ 400.0

Supplemental Cash Flow Information (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Supplemental Cash Flow Information [Abstract]

Cash paid for interest

$ 110.7

$ 130.6

$ 138.9

Cash paid for income taxes, net of refunds

111.8

^[1]

95.7

^[1]

102.0

^[1]

Proceeds from Income Tax Refunds

$ 15.0

$ 23.5

$ 25.4

[1]	Refunds of $15.0, $23.5 and $25.4 were received for the years ended December 31, 2013, 2012 and 2011, respectively.

Goodwill (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Goodwill

Current year acquisitions

$ 3,629.0

$ 3,580.6

$ 3,444.3

^[1]

75.3

^[1]

133.7

^[1]

Contingent and deferred payments for prior acquisitions

^[1]

2.2

^[1]

133.0

(26.9)

^[1],[2]

0.4

^[1],[2]

IAN

Goodwill

Current year acquisitions

3,109.3

^[1]

3,074.6

^[1]

2,952.9

^[1]

58.8

^[1]

122.0

^[1]

Contingent and deferred payments for prior acquisitions

^[1]

2.2

^[1]

(24.1)

^[1],[2]

(2.5)

^[1],[2]

CMG

Goodwill

Current year acquisitions

519.7

^[1]

506.0

^[1]

491.4

^[1]

16.5

^[1]

11.7

^[1]

Contingent and deferred payments for prior acquisitions

^[1]

U.S. federal statutory income tax rate

$ (2.8)

^[1],[2]

$ 2.9

^[1],[2]

[1]	For all periods presented we have not recorded a goodwill impairment charge.
[2]	Primarily includes foreign currency translation adjustments.

Other Intangible Assets (Details) (USD $)	12 Months Ended
Other Intangible Assets (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Future Amortization Expense 2014	$ 34,600,000
Future Amortization Expense 2015	34,300,000
Future Amortization Expense 2016	26,800,000
Future Amortization Expense 2017	10,800,000
Future Amortization Expense 2018	9,500,000
Finite-Lived Intangible Assets [Line Items]
Amortization Expense of Intangible Assets	26,800,000	23,400,000	20,200,000
Impairment of Intangible Assets (Excluding Goodwill)			0
Gross Amount	306,600,000	258,800,000
Accumulated Amortization	(142,800,000)	(118,100,000)
Net Amount	163,800,000	140,700,000
Acquired Finite-Lived Intangible Assets related to Acquisitions	21,500,000	67,000,000
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross Amount	228,100,000	184,000,000
Accumulated Amortization	(119,800,000)	(96,900,000)
Net Amount	108,300,000	87,100,000
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	64,500,000	59,700,000
Accumulated Amortization	(19,200,000)	(15,500,000)
Net Amount	45,300,000	44,200,000
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	14,000,000	15,100,000
Accumulated Amortization	(3,800,000)	(5,700,000)
Net Amount	$ 10,200,000	$ 9,400,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years

Components of Income Before Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income before income taxes, Domestic	$ 255.3	$ 386.9	$ 428.4
Income before income taxes, Foreign	212.7	287.9	310.0
Income before income taxes	$ 468.0	$ 674.8	$ 738.4

Provision for Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. federal income taxes (including foreign withholding taxes):
Current federal income taxes									$ 46.9	$ 9.4	$ 0.9
Deferred federal income taxes									25.2	118.1	92.3
Total federal income taxes									72.1	127.5	93.2
State and local income taxes:
Current state and local income taxes									(14.7)	17.1	12.3
Deferred state and local income taxes									24.7	25.3	11.3
Total state and local income taxes									10.0	42.4	23.6
Foreign income taxes:
Current foreign income taxes									79.6	83.2	93.1
Deferred foreign income taxes									19.5	(39.8)	(19.7)
Total foreign income taxes									99.1	43.4	73.4
Total provision for income taxes	$ 103.2	$ 28.4	$ 62.0	$ (12.4)	$ 140.5	$ 41.9	$ 50.1	$ (19.2)	$ 181.2	$ 213.3	$ 190.2

Reconciliation of Effective Income Tax Rate (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Valuation Allowance [Line Items]

35.00%

Income tax provision at U.S. federal statutory rate

$ 163.8

$ 236.2

$ 258.4

State and local income taxes, net of federal income tax benefit

6.5

27.3

15.3

Impact of foreign operations, including withholding taxes

30.5

8.4

(21.9)

Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent

3.2

^[1]

(57.3)

^[1]

(32.9)

^[1]

Worthless securities deduction

(22.2)

(23.0)

Increases (decreases) in unrecognized tax benefits, net

24.1

(2.7)

Total provision for income taxes

(0.6)

(25.4)

(3.0)

$ 103.2

$ 28.4

$ 62.0

$ (12.4)

$ 140.5

$ 41.9

$ 50.1

$ (19.2)

$ 181.2

$ 213.3

$ 190.2

Effective income tax rate on operations

38.70%

31.60%

25.80%

[1]	Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

Components of Deferred Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 32.5	$ 40.4
Deferred compensation	187.2	192.4
Pension costs	31.1	27.0
Basis differences in fixed assets	(4.1)	26.9
Rent	50.7	50.2
Interest	60.7	66.9
Accruals and reserves	39.6	51.1
Allowance for doubtful accounts	10.8	9.2
Basis differences in intangible assets	(402.2)	(364.9)
Investments in equity securities	48.6	(5.2)
Tax loss/tax credit carry forwards	443.6	449.7
Restructuring and other reorganization-related costs	2.6	1.2
Other	60.5	88.3
Total Deferred Tax Assets, Net	561.6	633.2
Valuation allowance	(467.3)	(392.9)	(489.9)	(508.1)
Net Deferred Tax Assets	$ 94.3	$ 240.3

Change in Valuation Allowance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation Allowance [Abstract]
Balance at beginning of period	$ 392.9	$ 489.9	$ 508.1
(Reversed) charged to costs and expenses	65.2	(49.5)	(25.1)
Charged (reversed) to gross tax assets and other accounts	9.2	(47.5)	6.9
Balance at end of period	$ 467.3	$ 392.9	$ 489.9

Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Balance at beginning of period	$ 194.6	$ 161.0	$ 146.7
Increases as a result of tax positions taken during a prior year	8.3	28.2	5.3
Decreases as a result of tax positions taken during a prior year	(1.9)	(6.8)	(18.1)
Settlements with taxing authorities	(34.9)	(0.7)	(5.0)
Lapse of statutes of limitation	(10.6)	(1.1)	0
Increases as a result of tax positions taken during the current year	63.7	14.0	32.3
Balance at end of period	$ 219.2	$ 194.6	$ 161.0

Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Gain on sale of portion of Facebook	$ 93.6
One hundred percent valuation allowance		100.00%
Operating loss carryforwards		1,407.1
Undistributed foreign earnings	2,110.0	1,959.8	2,110.0
Unrecognized tax benefits	194.6	219.2	194.6	161.0	146.7
Unrecognized tax benefits that would impact effective tax rate		207.9
Income tax penalties and interest accrued	13.5	11.9	13.5
Income tax penalties and interest expense		2.8	(1.4)
Estimated unrecognized tax benefit decrease, lower bound		10.0
Estimated unrecognized tax benefit decrease, upper bound		20.0
Tax contingency reserve adjustment			19.5
Domestic country \| Minimum
Income tax examination year		2007
Open tax years		2009
Domestic country \| Maximum
Income tax examination year		2008
State and local jurisdiction \| Minimum
Open tax years		1999
Foreign country
Operating loss carryforwards, no expiration		1,147.2
Operating loss carryforwards, subject to expiration		259.9
Foreign country \| Minimum
Operating loss carryforwards, expiration date		Jan. 01, 2014
Open tax years		2005
Foreign country \| Maximum
Operating loss carryforwards, expiration date		Jan. 01, 2032
Continental Europe
Reversal of valuation allowance			(21.8)
Asia Pacific
Reversal of valuation allowance			$ (26.2)

Restructuring and Other Reorganization-Related Charges (Reversals), net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges	$ 60.6	$ (0.2)	$ 0.3	$ (0.1)	$ (0.1)	$ (0.4)	$ (0.7)	$ 0	$ 60.6	$ (1.2)	$ 1.0
Prior Year Restructuring Plans
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									(0.6)
Restructuring Reserve	1.3								1.3
2013 Restructuring Plan
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									61.2
Non-cash items									(0.5)
Cash Payments									(11.0)
Foreign Currency Translation Adjustment									1.2
Restructuring Reserve	50.9								50.9
Restructuring and Related Cost, Number of Positions Eliminated									541
Employee Severance
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									55.9	0	(0.1)
Employee Severance \| 2013 Restructuring Plan
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									55.9
Non-cash items									0
Cash Payments									(10.6)
Foreign Currency Translation Adjustment									1.2
Restructuring Reserve	46.5								46.5
Real Estate
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									4.2	(1.1)	1.3
Real Estate \| 2013 Restructuring Plan
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									4.8
Non-cash items									(0.5)
Cash Payments									(0.4)
Foreign Currency Translation Adjustment									0
Restructuring Reserve	3.9								3.9
Other Restructuring
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									0.5	(0.1)	(0.2)
Other Restructuring \| 2013 Restructuring Plan
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									0.5
Non-cash items									0
Cash Payments									0
Foreign Currency Translation Adjustment									0
Restructuring Reserve	0.5								0.5
IAN \| 2013 Restructuring Plan
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									56.0
CMG
Restructuring and other Reorganization Related Charges (Reversals), net
Restructuring Charges									$ 5.0

Foreign currency translation adjustments

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References+ Details

Accumulated Other Comprehensive Loss, net of tax Reclassifications out of Accumulated Comprehensive Loss, net of tax (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

$ 0

Gains on available-for-sale securities

1.4

(0.7)

(0.3)

Losses on derivative instruments

(1.7)

(0.3)

Amortization of defined benefit pension and postretirement plans items 1

(10.8)

^[1]

(7.7)

(7.5)

Tax effect

$ (2.4)

[1]	1 These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 13 for further information

Amount before tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

+ References+ Details

Accumulated Other Comprehensive Loss, net of tax Changes from Accumulated Other Comprehensive Loss, net of tax (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss) before reclassifications on Derivatives Instruments before Tax	$ 0	$ (21.9)	$ 0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	(19.7)	(70.6)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(131.9)	(81.3)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	(0.6)	0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	0.8	0.4	(0.1)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(243.7)	(130.1)	(140.9)
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	0.4	0.8	0.2
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(1.2)	0.2
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1.0	9.2
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	9.5	9.6
Total Reclassification from AOCI	8.7	19.0
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(11.7)	(12.7)	0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	156.2	146.0	85.0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(411.2)	(288.0)	(225.7)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ (113.0)	$ 10.8

Plan Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2009
Incentive Compensation Plan Initiation Year	May 01, 2009
Performance condition of awards	range from 0% to 300% of the target amount
Maximum award value per employee	$ 6.0
Restricted Cash Plan Initiation Year	Mar. 01, 2009
Stock options
Number of shares initially available for grant		8.1
Stock option expiration period in years	10 years
Stock options \| Minimum
Award vesting period, years	2 years
Stock options \| Maximum
Award vesting period, years	4 years
Other Stock-based Awards
Number of shares initially available for grant		26.5
Award vesting period, years	3 years

Incentive Compensation Expense (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

$ 46.0

$ 50.4

$ 62.4

Tax benefit

17.6

19.7

22.1

Stock options

3.7

5.4

6.7

Stock-settled awards

9.8

14.9

21.9

Cash-settled awards

1.5

3.9

5.7

Performance-based awards

29.6

24.5

23.3

Employee stock purchase plan

0.6

0.7

Other

0.8

^[1]

1.1

^[1]

4.1

^[1]

Time based cash awards

Incentive compensation expense, Non share-based

4.0

10.9

16.6

Performance based cash awards

Incentive compensation expense, Non share-based

$ 18.3

$ 18.9

$ 22.0

[1]	Represents charges recorded for severance expense related to stock-based compensation awards.

Stock Option Activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options outstanding as of January 1, 2012	14.1
Granted	0.7
Exercised	(5.2)	(1.2)	(1.3)
Cancelled/expired	(0.1)
Forfeited	(0.1)
Stock options outstanding as of December 31, 2012	9.4	14.1
Stock options outstanding as of Jan 1, 2012, Weighted-average exercise price	$ 9.76
Granted, Weighted-average exercise price	$ 12.79
Exercised, Weighted-average exercise price	$ 9.25
Cancelled/expired, Weighted-average exercise price	$ 12.34
Forfeited, Weighted-average exercise price	$ 5.35
Stock options outstanding as of Dec 31, 2012, Weighted-average exercise price	$ 10.24	$ 9.76
Stock options outstanding, Weighted-average remaining contractual term	4 years 5 months
Stock options outstanding, Aggregate intrinsic value	$ 70.0
Stock options vested and expected to vest, Outstanding	9.4
Stock options vested and expected to vest, Weighted-average exercise price	$ 10.24
Stock options vested and expected to vest, Weighted-average remaining contractual term	4 years 5 months
Stock options vested and expected to vest, Aggregate intrinsic value	69.8
Stock options exercisable, Number	7.9
Stock options exercisable, Weighted-average exercise price	$ 9.92
Stock options exercisable, Weighted-average remaining contractual term	3 years 7 months
Stock options exercisable, Aggregate intrinsic value	61.3
Non-vested as of January 1, 2012	3.9
Granted	0.7
Vested	(3.0)
Forfeited	(0.1)
Non-vested as of December 31, 2012	1.5	3.9
Non-vested as of January 1, 2012, Weighted-average grant date fair value	$ 3.29
Granted, Weighted-average grant date fair value	$ 4.14	$ 4.24	$ 4.57
Vested, Weighted-average grant date fair value	$ 3.02
Forfeited, Weighted-average grant date fair value	$ 3.01
Non-vested as of December 31, 2012, Weighted-average grant date fair value	$ 4.21	$ 3.29
Non-vested options outstanding, Weighted-average remaining contractual term	8 years 2 months
Non-vested options outstanding, Aggregate intrinsic value	8.6
Intrinsic value of stock options exercised	26.2	2.0	3.2
Proceeds from Stock Options Exercised including Taxes Withheld	$ 59.5	$ 11.7	$ 13.3

Stock Option Valuation Assumptions (Details) (USD $)

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]

Expected volatility

40.20%

^[1]

43.80%

^[1]

39.90%

^[1]

Expected term (years)

6 years 11 months

^[2]

6 years 9 months

^[2]

6 years 8 months

^[2]

Risk free interest rate

1.30%

^[3]

1.30%

^[3]

2.80%

^[3]

Expected dividend yield

2.40%

^[4]

2.10%

^[4]

1.90%

^[4]

Annualized dividend per share used in calculation of expected dividend yield

$ 0.30

$ 0.24

[1]	The expected volatility used to estimate the fair value of stock options awarded is based on a blend of: (i) historical volatility of our common stock for periods equal to the expected term of our stock options and (ii) implied volatility of tradable forward put and call options to purchase and sell shares of our common stock.
[2]	The estimate of our expected term is based on the average of (i) an assumption that all outstanding options are exercised upon achieving their full vesting date and (ii) an assumption that all outstanding options will be exercised at the midpoint between the current date (i.e., the date awards have ratably vested through) and their full contractual term. In determining the estimate, we considered several factors, including the historical option exercise behavior of our employees and the terms and vesting periods of the options.
[3]	The risk free rate is determined using the implied yield currently available for zero-coupon U.S. government issuers with a remaining term equal to the expected term of the options.
[4]	The expected dividend yield is calculated based on an annualized dividend of $0.30 per share in 2013 and $0.24 per share in 2012 and 2011.

Share-based Compensation Awards (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-settled awards
Stock-based Payment Award
Awards granted	1.1	0.9	0.8
Weighted-average grant-date fair value (per award)	$ 13.51	$ 11.43	$ 11.94
Total fair value of vested awards distributed	$ 35.4	$ 63.5	$ 63.1
Accrued dividends on non-vested stock-settled awards	0.7	1.1
Dividends paid for stock-settled awards	1.5	1.7
Cash-settled awards
Stock-based Payment Award
Awards granted	0.1	0.1	0
Weighted-average grant-date fair value (per award)	$ 16.35	$ 10.94	$ 8.96
Total fair value of vested awards distributed	5.4	11.1	10.4
Performance-based awards
Stock-based Payment Award
Awards granted	1.5	1.8	1.8
Weighted-average grant-date fair value (per award)	$ 11.97	$ 10.61	$ 11.58
Total fair value of vested awards distributed	$ 17.7	$ 11.5	$ 30.8

Non-vested Award Activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-based Payment Award
Weighted-average years expected to be recognized over	1 year 5 months
Stock-settled awards
Stock-based Payment Award
Non-vested as of January 1, 2012	3.8
Granted	1.1	0.9	0.8
Vested	(2.8)
Forfeited	(0.2)
Non-vested as of December 31, 2012	1.9	3.8
Nonvested as of January 1, 2012, Weighted-average grant date fair value	$ 9.55
Granted, Weighted-average grant-date fair value	$ 13.51	$ 11.43	$ 11.94
Vested, Weighted-average grant date fair value	$ 8.98
Forfeited, Weighted-average grant date fair value	$ 10.40
Nonvested as of December 31, 2012, Weighted-average grant date fair value	$ 12.54	$ 9.55
Total unrecognized compensation expense remaining	$ 8.6
Weighted-average years expected to be recognized over	1 year 8 months
Cash-settled awards
Stock-based Payment Award
Non-vested as of January 1, 2012	0.5
Granted	0.1	0.1	0
Vested	(0.4)
Forfeited	(0.1)
Non-vested as of December 31, 2012	0.1	0.5
Nonvested as of January 1, 2012, Weighted-average grant date fair value	$ 8.62
Granted, Weighted-average grant-date fair value	$ 16.35	$ 10.94	$ 8.96
Vested, Weighted-average grant date fair value	$ 8.52
Forfeited, Weighted-average grant date fair value	$ 14.18
Nonvested as of December 31, 2012, Weighted-average grant date fair value	$ 12.03	$ 8.62
Total unrecognized compensation expense remaining	1.0
Weighted-average years expected to be recognized over	1 year 9 months
Performance-based awards
Stock-based Payment Award
Non-vested as of January 1, 2012	2.7
Granted	1.5	1.8	1.8
Vested	0
Forfeited	(0.1)
Non-vested as of December 31, 2012	4.1	2.7
Nonvested as of January 1, 2012, Weighted-average grant date fair value	$ 11.57
Granted, Weighted-average grant-date fair value	$ 11.97	$ 10.61	$ 11.58
Vested, Weighted-average grant date fair value	$ 9.93
Forfeited, Weighted-average grant date fair value	$ 11.91
Nonvested as of December 31, 2012, Weighted-average grant date fair value	$ 11.71	$ 11.57
Total unrecognized compensation expense remaining	16.7
Weighted-average years expected to be recognized over	1 year 11 months
Performance based cash awards settled in shares
Stock-based Payment Award
Total unrecognized compensation expense remaining	31.9
Weighted-average years expected to be recognized over	1 year 11 months
Cash awards granted during the period target value	35.6	33.6	31.9
Time based cash awards
Stock-based Payment Award
Cash awards granted during the period target value	4.6	2.7	4.2
Performance based cash awards
Stock-based Payment Award
Cash awards granted during the period target value	47.4	37.4	39.3
Stock options
Stock-based Payment Award
Total unrecognized compensation expense remaining	$ 3.3

Incentive Compensation Plans (Details)	12 Months Ended
Incentive Compensation Plans (Details)	Dec. 31, 2013
Employee Stock Purchase Plan description	90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months
Stock Issued During Period, Shares, Employee Stock Purchase Plans	2,600,000
Employee stock purchase plan
Maximum Employee Subscription Rate	10.00%
Maximum Number of Shares Per Employee	900
Number of shares initially available for grant	15,000,000

Fair Value on a Recurring Basis (Details) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Level 1

Fair value assets and liabilities measured on recurring and nonrecurring basis

$ 761.2

$ 1,806.6

5.3

16.0

1.6

1.5

Fair value of assets measured on a recurring basis, percentage of total assets

768.1

1,824.1

6.00%

13.50%

Fair value assets and liabilities measured on recurring and nonrecurring basis

^[1]

Level 2

Fair value of assets measured on a recurring basis, percentage of total assets

0.00%

Fair value assets and liabilities measured on recurring and nonrecurring basis

^[1]

Level 3

Restructuring Reserve

52.2

Fair value of assets measured on a recurring basis, percentage of total assets

0.00%

Fair value assets and liabilities measured on recurring and nonrecurring basis

27.0

^[1]

25.3

^[1]

Fair Value, Total

761.2

1,806.6

5.3

16.0

1.6

1.5

Fair value of assets measured on a recurring basis, percentage of total assets

768.1

1,824.1

6.00%

13.50%

$ 27.0

^[1]

$ 25.3

^[1]

[1]

Fair Value Unobservable Inputs (Details) (Mandatorily redeemable noncontrolling interests, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Mandatorily redeemable noncontrolling interests
Fair value assets and liabilities measured on recurring basis unobservable input reconciliation
Balance at beginning of period, mandatorily redeemable noncontrolling interests	$ 25.3	$ 58.9
Level 3 additions	0.2	0
Level 3 reductions	0	(34.9)
Realized losses included in net income	1.5	1.4
Foreign currency translation	0	(0.1)
Balance at end of period, mandatorily redeemable noncontrolling interests	$ 27.0	$ 25.3

Employee Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Number of Participants Domestic Pension Plan	4,000
Number of Participants Postretirement Benefit Plan	2,300
Deferred Compensation Arrangements [Abstract]
Deferred Compensation Liability	$ 92.7	$ 90.0
Deferred Compensation Expense	13.4	9.8	7.6
Deferred Benefit Liability	166.2	173.8
Deferred Benefit Expense	14.0	15.0	14.8
Cash Surrender Value of Life Insurance	162.3	150.2
Deferred Compensation Plan Assets	7.7	5.9
Supplemental Unemployment Benefits [Abstract]
Duration of disability benefits	24 months
Health and Life Insurance Benefit Obligation	10.5	11.3
Income Replacement Benefit Obligation	$ 0	$ 0

Pension and Postretirement Benefit Obligation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period End)	$ 508.1	$ 497.4
Domestic Pension Plan
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	140.6	129.0
Service cost	0	0	0
Interest cost	5.5	6.3	6.8
Benefits paid	(10.4)	(10.8)
Plan participant contributions	0	0
Actuarial losses (gains)	(2.6)	16.1
Settlements and curtailments	0	0
Foreign currency effect	0	0
Other	0	0
Benefit Obligation (Period End)	133.1	140.6	129.0
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	115.7	107.2
Actual return on plan assets	3.8	13.7
Employer contributions	0.5	5.6
Plan participant contributions	0	0
Benefits paid	(10.4)	(10.8)
Settlements	0	0
Foreign currency effect	0	0
Fair Value of Plan Assets (Period End)	109.6	115.7	107.2
Defined Benefit Plan, Funded Status of Plan	(23.5)	(24.9)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0	0
Current liability	0	0
Non-current liability	(23.5)	(24.9)
Net liability recognized	(23.5)	(24.9)
Accumulated benefit obligation	133.1	140.6
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	47.0	53.6
Prior service cost (credit)	0	0
Transition obligation	0	0
Total amount recognized	47.0	53.6
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	6.6
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	133.1	140.6
Aggregate accumulated benefit obligation	133.1	140.6
Aggregate fair value of plan assets	109.6	115.7
Foreign Pension Plans
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	532.4	456.6
Service cost	9.9	10.2	9.6
Interest cost	21.7	21.9	23.3
Benefits paid	(23.8)	(20.4)
Plan participant contributions	0.5	0.6
Actuarial losses (gains)	25.0	60.0
Settlements and curtailments	(3.1)	(6.5)
Foreign currency effect	8.1	8.9
Other	(0.8)	1.1
Benefit Obligation (Period End)	569.9	532.4	456.6
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	381.7	363.6
Actual return on plan assets	19.5	17.6
Employer contributions	18.3	17.7
Plan participant contributions	0.5	0.6
Benefits paid	(23.8)	(20.4)
Settlements	(2.7)	(6.1)
Foreign currency effect	5.0	8.7
Fair Value of Plan Assets (Period End)	398.5	381.7	363.6
Defined Benefit Plan, Funded Status of Plan	(171.4)	(150.7)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	8.0	7.4
Current liability	(7.6)	(8.4)
Non-current liability	(171.8)	(149.7)
Net liability recognized	(171.4)	(150.7)
Accumulated benefit obligation	540.9	508.5
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	141.0	115.7
Prior service cost (credit)	1.5	1.8
Transition obligation	0	0
Total amount recognized	142.5	117.5
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	3.5
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	553.2	515.8
Aggregate accumulated benefit obligation	528.7	497.3
Aggregate fair value of plan assets	374.7	358.5
Domestic Postretirement Benefit Plan
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	46.6	50.8
Service cost	0.1	0.2	0.2
Interest cost	1.6	2.3	2.7
Benefits paid	(6.4)	(5.9)
Plan participant contributions	1.7	1.7
Actuarial losses (gains)	(5.7)	(2.5)
Settlements and curtailments	0	0
Foreign currency effect	0	0
Other	0	0
Benefit Obligation (Period End)	37.9	46.6	50.8
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	0	0
Actual return on plan assets	0	0
Employer contributions	4.7	4.2
Plan participant contributions	1.7	1.7
Benefits paid	(6.4)	(5.9)
Settlements	0	0
Foreign currency effect	0	0
Fair Value of Plan Assets (Period End)	0	0	0
Defined Benefit Plan, Funded Status of Plan	(37.9)	(46.6)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0	0
Current liability	(4.2)	(4.6)
Non-current liability	(33.7)	(42.0)
Net liability recognized	(37.9)	(46.6)
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	(1.5)	4.2
Prior service cost (credit)	(0.1)	(0.2)
Transition obligation	0	0
Total amount recognized	$ (1.6)	$ 4.0

Net Periodic Cost (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Domestic Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0	$ 0	$ 0
Interest cost	5.5	6.3	6.8
Expected return on plan assets	(7.7)	(7.7)	(7.5)
Settlement and curtailment losses	0	0	0
Amortization of:
Transition obligation	0	0	0
Prior service cost (credit)	0	0	0
Unrecognized actuarial losses	7.9	6.4	6.6
Defined Benefit Plan, Net Periodic Benefit Cost	5.7	5.0	5.9
Net Periodic Benefit, Discount Rate	4.00%	5.00%	5.50%
Expected Long-term Return on Assets	7.00%	7.25%	7.50%
Benefit Obligation, Discount Rate	4.85%	4.00%	5.00%
Foreign Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	9.9	10.2	9.6
Interest cost	21.7	21.9	23.3
Expected return on plan assets	(19.2)	(18.2)	(19.0)
Settlement and curtailment losses	(0.1)	0.7	0
Amortization of:
Transition obligation	0	0	0
Prior service cost (credit)	0.2	0.2	0.2
Unrecognized actuarial losses	2.8	1.0	0.7
Defined Benefit Plan, Net Periodic Benefit Cost	15.3	15.8	14.8
Net Periodic Benefit, Discount Rate	4.32%	5.00%	5.45%
Net Periodic Benefit, Rate of Compensation Increase	3.57%	3.66%	4.37%
Expected Long-term Return on Assets	5.24%	5.02%	5.88%
Benefit Obligation, Discount Rate	4.29%	4.32%	5.00%
Benefit Obligation, Rate of Compensation Increase	3.97%	3.57%	3.66%
Domestic Postretirement Benefit Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	0.1	0.2	0.2
Interest cost	1.6	2.3	2.7
Expected return on plan assets	0	0	0
Settlement and curtailment losses	0	0	0
Amortization of:
Transition obligation	0	0.2	0.1
Prior service cost (credit)	(0.1)	(0.1)	(0.1)
Unrecognized actuarial losses	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 1.6	$ 2.6	$ 2.9
Net Periodic Benefit, Discount Rate	4.00%	5.00%	5.50%
Benefit Obligation, Discount Rate	4.85%	4.00%	5.00%
Health Care Cost Trend Rate Assumed for Next Year	7.50%	8.00%	8.00%
Year Ultimate Trend Rate is Reached	2019	2019	2016
Ultimate Health Care Cost Trend Rate	5.00%	5.00%	5.50%

Fair Value of Pension Plan Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	$ 508.1	$ 497.4
Balance at beginning of period	88.3	85.0
Actual return on plan assets:
Assets sold during the year	0.6	0
Assets still held at year end	(0.8)	0.9
Net purchases, sales and settlements	(26.0)	2.4
Balance at end of period	62.1	88.3
Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	62.4	50.9
Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	383.6	358.2
Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	62.1	88.3
Investment funds
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	406.7	398.4
Balance at beginning of period	48.2	43.8
Actual return on plan assets:
Assets sold during the year	0.6	0
Assets still held at year end	1.9	2.2
Net purchases, sales and settlements	(25.3)	2.2
Balance at end of period	25.4	48.2
Investment funds \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	22.2	22.3
Investment funds \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	359.1	327.9
Investment funds \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	25.4	48.2
Insurance contracts
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	22.0	24.8
Insurance contracts \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Insurance contracts \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	22.0	24.8
Insurance contracts \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Limited partnerships
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	36.1	39.8
Balance at beginning of period	39.8	41.1
Actual return on plan assets:
Assets sold during the year	0	0
Assets still held at year end	(2.9)	(1.3)
Net purchases, sales and settlements	(0.8)	0
Balance at end of period	36.1	39.8
Limited partnerships \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Limited partnerships \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Limited partnerships \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	36.1	39.8
Other plan assets
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	43.3	34.4
Balance at beginning of period	0.3	0.1
Actual return on plan assets:
Assets sold during the year	0	0
Assets still held at year end	0.2	0
Net purchases, sales and settlements	0.1	0.2
Balance at end of period	0.6	0.3
Other plan assets \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	40.2	28.6
Other plan assets \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	2.5	5.5
Other plan assets \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	$ 0.6	$ 0.3

Employee Benefits Allocation of Plan Assets (Details)	12 Months Ended
Employee Benefits Allocation of Plan Assets (Details)	Dec. 31, 2013	Dec. 31, 2012
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	100.00%
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Equity securities
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	24.00%
Defined Benefit Plan, Actual Plan Asset Allocations	24.00%	22.00%
Fixed income securities
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	47.00%
Defined Benefit Plan, Actual Plan Asset Allocations	43.00%	44.00%
Real estate
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	7.00%
Defined Benefit Plan, Actual Plan Asset Allocations	5.00%	5.00%
Other plan assets
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	22.00%
Defined Benefit Plan, Actual Plan Asset Allocations	28.00%	29.00%

Pension Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Domestic Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions		$ 0.5	$ 5.6
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	3.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected Future Benefit Payments in 2013		10.7
Expected Future Benefit Payments in 2014		10.4
Expected Future Benefit Payments in 2015		10.1
Expected Future Benefit Payments in 2016		9.9
Expected Future Benefit Payments in 2017		9.6
Expected Future Benefit Payments in 2018-2022		44.3
Foreign Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions		18.3	17.7
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	25.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected Future Benefit Payments in 2013		22.1
Expected Future Benefit Payments in 2014		24.2
Expected Future Benefit Payments in 2015		25.4
Expected Future Benefit Payments in 2016		25.1
Expected Future Benefit Payments in 2017		26.5
Expected Future Benefit Payments in 2018-2022		151.4
Domestic Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions		4.7	4.2
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected Future Benefit Payments in 2013		4.6
Expected Future Benefit Payments in 2014		4.5
Expected Future Benefit Payments in 2015		4.3
Expected Future Benefit Payments in 2016		4.1
Expected Future Benefit Payments in 2017		3.9
Expected Future Benefit Payments in 2018-2022		15.8
Disclosure of Expected Federal Subsidy Receipts
Prescription Drug Subsidy Receipts in 2013		0.4
Prescription Drug Subsidy Receipts in 2014		0.4
Prescription Drug Subsidy Receipts in 2015		0.4
Prescription Drug Subsidy Receipts in 2016		0.5
Prescription Drug Subsidy Receipts in 2017		0.5
Prescription Drug Subsidy Receipts in 2018-2022		$ 1.6

Operations (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Segments:

$ 2,122.7

$ 1,700.4

$ 1,756.2

$ 1,543.0

$ 2,063.3

$ 1,670.4

$ 1,715.7

$ 1,506.8

$ 7,122.3

$ 6,956.2

$ 7,014.6

Other (expense) income, net

658.9

677.1

688.2

Restructuring Charges

(60.6)

0.2

(0.3)

0.1

0.4

0.7

(60.6)

1.2

(1.0)

Interest expense

(122.7)

(133.5)

(136.8)

Interest income

24.7

29.5

37.8

7.7

(46.6)

^[1]

4.8

1.8

95.4

^[1]

1.7

4.7

(1.3)

(32.3)

100.5

150.2

Income before income taxes

468.0

674.8

738.4

Depreciation and amortization of fixed assets and intangible assets

157.4

147.7

150.9

173.0

169.2

140.3

IAN

Segments:

5,795.6

5,728.5

5,891.8

Depreciation and amortization of fixed assets and intangible assets

662.1

700.2

728.8

126.0

119.7

125.7

109.0

97.5

94.1

CMG

Segments:

1,326.7

1,227.7

1,122.8

Depreciation and amortization of fixed assets and intangible assets

137.6

114.2

101.4

Restructuring Charges

(5.0)

15.6

14.4

12.8

18.5

26.7

16.9

Corporate and Other

Segments:

Depreciation and amortization of fixed assets and intangible assets

(140.8)

(137.3)

(142.0)

15.8

13.6

12.4

Business Acquisition, Contingent Consideration [Line Items]

$ 45.5

$ 45.0

$ 29.3

[1]	The three months ended September 30, 2013 include a pre-tax loss of $45.2, related to our early extinguishment of debt. The three months ended December 31, 2012 include a pre-tax gain of $93.6 related to the sale of our holdings in Facebook.

Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Segments:
Assets	$ 12,905.0	$ 13,493.9
CMG
Segments:
Assets	1,203.8	1,073.1
Corporate and Other
Segments:
Assets	276.1	1,385.5
IAN
Segments:
Assets	$ 11,425.1	$ 11,035.3

Segment Information Major Geographic Area (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues and Long-Lived Assets
Long-Lived Assets	$ 884.3				$ 840.1				$ 884.3	$ 840.1
Revenue	2,122.7	1,700.4	1,756.2	1,543.0	2,063.3	1,670.4	1,715.7	1,506.8	7,122.3	6,956.2	7,014.6
Domestic
Revenues and Long-Lived Assets
Long-Lived Assets	545.7				502.5				545.7	502.5
Revenue									3,972.6	3,803.6	3,887.7
Total international
Revenues and Long-Lived Assets
Long-Lived Assets	338.6				337.6				338.6	337.6
Revenue									3,149.7	3,152.6	3,126.9
United Kingdom
Revenues and Long-Lived Assets
Long-Lived Assets	60.8				64.3				60.8	64.3
Revenue									568.3	572.0	539.4
Continental Europe
Revenues and Long-Lived Assets
Long-Lived Assets	79.6				76.0				79.6	76.0
Revenue									800.6	823.1	908.9
Asia Pacific
Revenues and Long-Lived Assets
Long-Lived Assets	88.8				88.0				88.8	88.0
Revenue									868.9	838.1	741.7
Latin America
Revenues and Long-Lived Assets
Long-Lived Assets	72.3				70.5				72.3	70.5
Revenue									464.5	450.1	444.4
Other
Revenues and Long-Lived Assets
Long-Lived Assets	37.1				38.8				37.1	38.8
Revenue									$ 447.4	$ 469.3	$ 492.5

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Gross rent expense	$ 366.1	$ 358.5	$ 369.5
Third-party sublease rental income	(16.1)	(17.5)	(19.4)
Net rent expense	$ 350.0	$ 341.0	$ 350.1

Future minimum lease payments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Rent Expense	$ 366.1	$ 358.5	$ 369.5
Rent Obligations, due 2013	327.6
Rent Obligations, due 2014	296.9
Rent Obligations, due 2015	247.9
Rent Obligations, due 2016	201.9
Rent Obligations, due 2017	180.2
Rent Obligations, due thereafter	702.7
Total Rent Obligations	1,957.2
Sublease Rental Income, due 2013	(17.0)
Sublease Rental Income, due 2014	(8.5)
Sublease Rental Income, due 2015	(2.6)
Sublease Rental Income, due 2016	(0.6)
Sublease Rental Income, due 2017	0
Sublease Rental Income, due thereafter	0
Total Sublease Rental Income	(28.7)
Net Rent, due 2013	310.6
Net Rent, due 2014	288.4
Net Rent, due 2015	245.3
Net Rent, due 2016	201.3
Net Rent, due 2017	180.2
Net Rent, due thereafter	702.7
Total Net Rent	1,928.5
Operating Leases, Rent Expense, Sublease Rentals	16.1	17.5	19.4
Operating Leases, Rent Expense, Net	$ 350.0	$ 341.0	$ 350.1

Guarantees (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Parent company guarantees on lease obligations	$ 588.1	$ 410.3
Parent company guarantees relating to credit facilities	279.6	283.4
Assets pledged as security for parent company guarantees	$ 0

Contingent Acquisition Obligations (Details) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2013

Deferred acquisition payments

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

$ 10.2

Recorded Unconditional Purchase Obligation Due in Second Year

23.5

Recorded Unconditional Purchase Obligation Due in Third Year

18.9

Recorded Unconditional Purchase Obligation Due in Fourth Year

20.0

Recorded Unconditional Purchase Obligation Due in Fifth Year

5.9

Recorded Unconditional Purchase Obligation Due after Fifth Year

0.5

Business Acquisition, Contingent Consideration [Line Items]

79.0

Redeemable noncontrolling interests and call options with affiliates

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

27.9

Recorded Unconditional Purchase Obligation Due in Second Year

59.8

Recorded Unconditional Purchase Obligation Due in Third Year

42.4

Recorded Unconditional Purchase Obligation Due in Fourth Year

5.1

Recorded Unconditional Purchase Obligation Due in Fifth Year

9.6

Recorded Unconditional Purchase Obligation Due after Fifth Year

15.3

Business Acquisition, Contingent Consideration [Line Items]

160.1

^[1]

Redeemable at noncontrolling equity owners discretion

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

23.8

Total contingent acquisition payments

Business Acquisition, Contingent Consideration [Line Items]

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

38.1

Recorded Unconditional Purchase Obligation Due in Second Year

83.3

Recorded Unconditional Purchase Obligation Due in Third Year

61.3

Recorded Unconditional Purchase Obligation Due in Fourth Year

25.1

Recorded Unconditional Purchase Obligation Due in Fifth Year

15.5

Recorded Unconditional Purchase Obligation Due after Fifth Year

15.8

Business Acquisition, Contingent Consideration [Line Items]

239.1

Cash compensation expense included in contingent acquisitions

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

0.4

Recorded Unconditional Purchase Obligation Due in Second Year

0.3

Recorded Unconditional Purchase Obligation Due in Third Year

0.3

Recorded Unconditional Purchase Obligation Due in Fourth Year

0.1

Recorded Unconditional Purchase Obligation Due in Fifth Year

Recorded Unconditional Purchase Obligation Due after Fifth Year

Business Acquisition, Contingent Consideration [Line Items]

1.1

Total contingent acquisition payments excluding compensation expense

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

37.7

Recorded Unconditional Purchase Obligation Due in Second Year

83.0

Recorded Unconditional Purchase Obligation Due in Third Year

61.0

Recorded Unconditional Purchase Obligation Due in Fourth Year

25.0

Recorded Unconditional Purchase Obligation Due in Fifth Year

15.5

Recorded Unconditional Purchase Obligation Due after Fifth Year

15.8

Quarterly Financial Information Disclosure [Abstract]

$ 238.0

[1]

Results by Quarter (Unaudited) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011