Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenue	$ 2,580,905	$ 1,937,753	$ 6,680,735	$ 4,973,750
Intersegment revenue	0	0	0	0
Adjusted EBITDA	666,688	469,054	1,174,137	823,166
Depreciation	(123,555)	(87,156)	(344,833)	(240,878)
Amortization of intangible assets	(77,080)	(31,400)	(251,260)	(83,322)
Stock-based compensation	(48,263)	(63,656)	(197,602)	(134,036)
Legal reserves, occupancy tax and other	(22,332)	114,550	(28,650)	106,511
Restructuring and related reorganization charges	(5,591)	(42,449)	(33,584)	(52,771)
Realized (gain) loss on revenue hedges	(3,715)	(13,945)	(3,692)	(34,581)
Operating income	386,152	344,998	314,516	384,089
Other income (expense), net	(46,597)	(2,811)	(153,042)	547,806
Income before income taxes	339,555	342,187	161,474	931,895
Provision for income taxes	(60,627)	(65,950)	14,929	(196,261)
Net income	278,928	276,237	176,403	735,634
Net loss attributable to noncontrolling interests	403	6,979	25,988	41,369
Net income attributable to Expedia, Inc.	279,331	283,216	202,391	777,003
Core OTA
Segment Reporting Information [Line Items]
Revenue	2,083,393	1,739,363	5,388,178	4,372,224
trivago
Segment Reporting Information [Line Items]
Revenue	175,953	104,162	422,852	266,287
Egencia
Segment Reporting Information [Line Items]
Revenue	111,762	94,228	346,117	293,496
eLong
Segment Reporting Information [Line Items]
Revenue	209,797	0	523,588	41,743
Reportable Segments | Core OTA
Segment Reporting Information [Line Items]
Revenue	2,083,393	1,739,363	5,388,178	4,372,224
Intersegment revenue	0	0	0	0
Adjusted EBITDA	713,849	589,433	1,434,424	1,193,228
Depreciation	(65,251)	(48,269)	(186,308)	(134,527)
Amortization of intangible assets	0	0	0	0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	(3,715)	(13,945)	(3,692)	(34,581)
Operating income	644,883	527,219	1,244,424	1,024,120
Reportable Segments | trivago
Segment Reporting Information [Line Items]
Revenue	276,473	175,601	653,166	437,271
Intersegment revenue	100,520	71,439	230,314	170,984
Adjusted EBITDA	5,725	(9,496)	20,466	(13,421)
Depreciation	(2,622)	(574)	(5,593)	(1,461)
Amortization of intangible assets	0	0	0	0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	0	0	0	0
Operating income	3,103	(10,070)	14,873	(14,882)
Reportable Segments | Egencia
Segment Reporting Information [Line Items]
Revenue	111,762	94,228	346,117	293,496
Intersegment revenue	0	0	0	0
Adjusted EBITDA	18,155	14,140	59,986	57,637
Depreciation	(8,342)	(6,086)	(23,267)	(17,874)
Amortization of intangible assets	0	0	0	0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	0	0	0	0
Operating income	9,813	8,054	36,719	39,763
Reportable Segments | eLong
Segment Reporting Information [Line Items]
Revenue	209,797	0	523,588	41,743
Intersegment revenue	0	0	0	0
Adjusted EBITDA	77,342	0	132,926	(62,167)
Depreciation	(4,954)	0	(12,721)	(3,263)
Amortization of intangible assets	0	0	0	0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	0	0	0	0
Operating income	72,388	0	120,205	(65,430)
Corporate & Eliminations
Segment Reporting Information [Line Items]
Revenue	(100,520)	(71,439)	(230,314)	(170,984)
Intersegment revenue	(100,520)	(71,439)	(230,314)	(170,984)
Adjusted EBITDA	(148,383)	(125,023)	(473,665)	(352,111)
Depreciation	(42,386)	(32,227)	(116,944)	(83,753)
Amortization of intangible assets	(77,080)	(31,400)	(251,260)	(83,322)
Stock-based compensation	(48,263)	(63,656)	(197,602)	(134,036)
Legal reserves, occupancy tax and other	(22,332)	114,550	(28,650)	106,511
Restructuring and related reorganization charges	(5,591)	(42,449)	(33,584)	(52,771)
Realized (gain) loss on revenue hedges	0	0	0	0
Operating income	$ (344,035)	$ (180,205)	$ (1,101,705)	$ (599,482)