Quarterly Financial Information - Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue		$ 2,319,208	$ 2,965,848	$ 2,586,052	$ 2,188,736	$ 2,092,829	$ 2,580,905	$ 2,195,869	$ 1,903,961	$ 10,059,844	$ 8,773,564	$ 6,672,317
Operating income (loss)		113,475	481,728	102,768	(72,833)	147,186	386,152	25,662	(97,298)	625,138	461,702	413,566
Net income attributable to Expedia, Inc.		$ 55,159	$ 352,238	$ 56,689	$ (86,122)	$ 79,457	$ 279,331	$ 31,649	$ (108,589)	377,964	281,848	764,465
Basic earnings (loss) per share (in dollars per share)		$ 0.36	$ 2.32	$ 0.37	$ (0.57)	$ 0.53	$ 1.86	$ 0.21	$ (0.72)
Diluted earnings (loss) per share (in dollars per share)		$ 0.35	$ 2.23	$ 0.36	$ (0.57)	$ 0.51	$ 1.81	$ 0.21	$ (0.72)
Impairment of intangible assets						$ 33,000				0	34,890	7,207
Restructuring charges	[1]									$ 16,738	$ 55,907	$ 104,871

[1] (1) Includes stock-based compensation as follows: Cost of revenue$10,173 $11,388 $5,307Selling and marketing39,855 46,654 33,164Technology and content54,633 63,536 26,766General and administrative44,689 108,149 80,082Restructuring and related reorganization charges— 12,690 32,749