Other Comprehensive Income Loss Net of Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Components Of Other Comprehensive Income Loss [Line Items]
Net income	$ 280,440		$ 474,603		$ 425,560
Currency translation adjustments and other	17,564		(1,161)		(11,996)
Unrealized gains (losses) on available for sale securities, net of taxes	1,098	[1]	(79)	[1]	329	[1]
Comprehensive income	299,102		473,363		413,893
Less: Comprehensive income attributable to noncontrolling interests	(1,559)		(9,616)		(4,575)
Comprehensive income attributable to Expedia, Inc.	$ 297,543		$ 463,747		$ 409,318

[1] Net gains (losses) recognized and reclassified during 2012, 2011 and 2010 were immaterial.