Management’s Discussion and Analysis of Financial Condition and Results of Operations - (continued)
(Amounts in Millions, Except Per Share Amounts)
available to be repurchased from the $300.0 authorization made by the Board in February 2014 (the "2014 Share Repurchase Program"). We fully utilized the 2014 Share Repurchase Program during the third quarter of 2015. As of December 31, 2015, $158.6 remained available for repurchase under the 2015 Share Repurchase Program.
On February 12, 2016, 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 new authorization is in addition to any amounts remaining for repurchase under the 2015 Share Repurchase Program. There is no expiration date associated with the share repurchase programs.
We may effect such repurchases through open market purchases, trading plans established in accordance with SEC rules, derivative transactions or other means. We expect to continue to repurchase our common stock in future periods, although the timing and amount of the repurchases will depend on market conditions and other funding requirements.
FINANCING AND SOURCES OF FUNDS
Substantially all of our operating cash flow is generated by our agencies. Our cash balances are held in numerous jurisdictions throughout the world, primarily at the holding company level and at our largest subsidiaries. Below is a summary of our sources of liquidity.
December 31, 2015
of Credit 1
Cash, cash equivalents and marketable securities
Committed credit agreement
Uncommitted credit arrangements
We are required from time to time to post letters of credit, primarily to support obligations of our subsidiaries. These letters of credit historically have not been drawn upon.
At December 31, 2015, we held $677.5 of cash, cash equivalents and marketable securities in foreign subsidiaries. We have not provided U.S. federal income taxes on undistributed foreign earnings of our foreign subsidiaries because we consider such earnings to be permanently reinvested outside the United States. If in the future we distribute these amounts to the United States, an additional provision for the U.S. income and foreign withholding taxes, net of foreign tax credits, could be necessary.
We maintain a committed corporate credit facility to increase our financial flexibility, which has been amended and restated from time to time (the "Credit Agreement"). The Credit Agreement is a revolving facility, expiring in October 2020, 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 has 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. We use our Credit Agreement to provide letters of credit primarily to support obligations of our subsidiaries. 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, 2015, the applicable margin was 0.30% for base rate advances and 1.30% 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 0.25%. We also pay a facility fee at an annual rate that is determined based on our credit ratings, which as of December 31, 2015, was 0.20% on the aggregate lending commitment under the Credit Agreement.