Document and Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 26, 2013 Common Stock	Apr. 26, 2013 Class B Convertible Common Stock
Entity Registrant Name	IAC/INTERACTIVECORP
Entity Central Index Key	0000891103
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		77,930,674	5,789,499