Document and Entity Information	9 Months Ended
	Sep. 30, 2012	Oct. 12, 2012 Common Stock	Oct. 12, 2012 Class B Common Stock
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Trading Symbol	EXPE
Entity Registrant Name	EXPEDIA, INC.
Entity Central Index Key	0001324424
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		122,068,153	12,799,999