Document and Entity Information (USD $)	6 Months Ended
	Jun. 30, 2013	Jul. 26, 2013
Entity Registrant Name	IAC/INTERACTIVECORP
Entity Central Index Key	0000891103
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 3,963,580,179
Document Type	10-Q
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock
Entity Common Stock, Shares Outstanding		77,185,633
Class B Convertible Common Stock
Entity Common Stock, Shares Outstanding		5,789,499