v2.4.0.8
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Jan. 31, 2014
Common stock
Jan. 31, 2014
Class B convertible common stock
Entity Registrant Name IAC/INTERACTIVECORP      
Entity Central Index Key 0000891103      
Document Type 8-K      
Document Period End Date Dec. 31, 2013      
Amendment Flag false      
Current Fiscal Year End Date --12-31      
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Filer Category Large Accelerated Filer      
Entity Public Float   $ 3,630,574,214    
Entity Common Stock, Shares Outstanding     76,427,289 5,789,499
Document Fiscal Year Focus 2013      
Document Fiscal Period Focus FY