Quarterly Financial Information - Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended								12 Months Ended
	Oct. 01, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenue		$ 2,747	$ 3,558	$ 3,153	$ 2,609	$ 2,559	$ 3,276	$ 2,880	$ 2,508	$ 12,067	$ 11,223	$ 10,060
Operating income		160	609	265	(131)	96	672	111	(165)	903	714	625
Net income attributable to Expedia, Inc.		$ 76	$ 409	$ 183	$ (103)	$ 17	$ 525	$ 1	$ (137)	$ 565	$ 406	$ 378
Basic (in dollars per share)		$ 0.52	$ 2.77	$ 1.23	$ (0.69)	$ 0.11	$ 3.51	$ 0.01	$ (0.91)	$ 3.84	$ 2.71	$ 2.49
Diluted (in dollars per share)		$ 0.52	$ 2.71	$ 1.21	$ (0.69)	$ 0.11	$ 3.43	$ 0.01	$ (0.91)	$ 3.77	$ 2.65	$ 2.42
Goodwill [Line Items]
Impairment of goodwill										$ 0	$ 86	$ 0
Impairment of intangible assets										0	42	0
Core OTA
Quarterly Financial Information Disclosure [Abstract]
Revenue										$ 9,427	8,760	$ 7,881
Goodwill [Line Items]
Impairment of goodwill											86
Impairment of intangible assets	$ 42
Nonrecurring Basis | Reporting Unit Within Core Online Travel Companies
Goodwill [Line Items]
Impairment of goodwill	$ 25							$ 61			$ 86