v2.4.0.6
Document and Entity Information
9 Months Ended
Sep. 30, 2011
Oct. 17, 2011
Document and Entity Information [Line Items]    
Amendment Flag false  
Entity Registrant Name INTERPUBLIC GROUP OF COMPANIES, INC.  
Entity Central Index Key 0000051644  
Entity Common Stock, Shares Outstanding   461,172,626
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2011  
Document Fiscal Year Focus 2011  
Document Fiscal Period Focus Q3