Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Disclosure [Line Items]
Income from continuing operations attributable to Expedia, Inc.																	$ 398,097	$ 232,850	$ 302,710
Earnings per share from continuing operations attributable to Expedia, Inc. available to common stockholders:
Basic	$ 0.52	[1]	$ 2.01	[1]	$ 0.69	[1]	$ (0.11)	[1]	$ 0.72	[1]	$ 1.25	[1]	$ 0.52	[1]	$ (0.77)	[1]	$ 3.09	$ 1.73	$ 2.26
Diluted	$ 0.50	[1]	$ 1.94	[1]	$ 0.67	[1]	$ (0.11)	[1]	$ 0.70	[1]	$ 1.22	[1]	$ 0.51	[1]	$ (0.77)	[1]	$ 2.99	$ 1.67	$ 2.16
Weighted average number of shares outstanding: Basic																	128,912	134,912	134,203
Options to purchase common stock																	4,149	4,495	4,383
Warrants to purchase common stock																			800
Other dilutive securities																	107	186	543
Weighted average number of shares outstanding, Diluted																	133,168	139,593	139,929

[1] Earnings per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly earnings per share may not equal the total computed for the year.