Segment Information - Performance Measures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue, Net	$ 3,029	$ 96	$ 7,905	$ 325
Adjusted OIBDA	713	7	1,241	22
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue, Net	3,029	96	7,905	325
Adjusted OIBDA	713	7	1,241	22
Expedia
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue, Net	2,963		7,675
Adjusted OIBDA	715		1,241
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue, Net	66	96	$ 230	325
Adjusted OIBDA	$ (2)	$ 7		$ 22