Segment Information - Reconciliation of Segment Adjusted OBIDA to Earnings (Loss) Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Information
Combined segment Adjusted OIBDA								$ 146	$ 33	$ 31
Legal reserves, occupancy tax and other								2
Restructuring and related reorganization charges								(9)
Stock-based compensation								(47)	(2)	(2)
Depreciation and amortization								(481)	(21)	(19)
Operating income (loss)	$ (397)	$ 2	$ 3	$ 3	$ 4	$ 3	$ 3	(389)	10	10
Interest expense								(19)	(1)	(1)
Related party interest expense									(1)	(2)
Share of earnings (losses) of Expedia								26	117	58
Gain (loss) on dilution of Expedia								(2)	320	3
Gain on consolidation of Expedia								2,005
Other, net										(1)
Earnings (loss) before income taxes								$ 1,621	$ 445	$ 67