Document and Entity Information (USD $)	6 Months Ended
	Jun. 30, 2012	Jul. 20, 2012
Entity Registrant Name	IAC/INTERACTIVECORP
Entity Central Index Key	0000891103
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 3,937,627,516
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Common Stock
Entity Common Stock, Shares Outstanding		81,770,377
Class B Common Stock
Entity Common Stock, Shares Outstanding		5,789,499