Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012	Jan. 25, 2013 Common Stock	Jan. 25, 2013 Class B Common Stock
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Trading Symbol	EXPE
Entity Registrant Name	EXPEDIA, INC.
Entity Central Index Key	0001324424
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding			122,588,188	12,799,999
Entity Public Float		$ 4,616,389,000