v2.4.0.6
Document and Entity Information
6 Months Ended
Jun. 30, 2013
Jul. 15, 2013
Document and Entity Information [Abstract]    
Amendment Flag false  
Entity Registrant Name INTERPUBLIC GROUP OF COMPANIES, INC.  
Entity Central Index Key 0000051644  
Entity Common Stock, Shares Outstanding   422,150,896
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2