v2.4.0.8
Document and Entity Information Document (USD $)
12 Months Ended
Dec. 31, 2013
Feb. 14, 2014
Jun. 30, 2012
DEI [Abstract]      
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 6,162,561,984
Entity Registrant Name INTERPUBLIC GROUP OF COMPANIES, INC.    
Entity Central Index Key 0000051644    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   424,041,377