Segment Information - Summary of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2017		Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 424		$ 391		$ 796		$ 743
Adjusted EBITDA	101	[1]	95	[2]	174	[1]	180	[2]
Depreciation	(19)		(17)		(38)		(33)
Amortization of intangible assets	(8)		(8)		(16)		(15)
Stock-based compensation	(28)		(23)		(47)		(43)
Operating income	46		47		73		89
Other expense, net	(2)		(3)		(4)		(6)
Income before income taxes	44		44		69		83
Provision for income taxes	(17)		(10)		(29)		(19)
Net income	27		34		40		64
Operating Segments | Non-Hotel Segment
Segment Reporting Information [Line Items]
Revenue	98		75		156		124
Adjusted EBITDA	17	[1]	(10)	[2]	2	[1]	(31)	[2]
Operating Segments | Hotel Segment
Segment Reporting Information [Line Items]
Revenue	326		316		640		619
Adjusted EBITDA	84	[1]	105	[2]	172	[1]	211	[2]
Corporate and Unallocated
Segment Reporting Information [Line Items]
Depreciation	(19)		(17)		(38)		(33)
Amortization of intangible assets	(8)		(8)		(16)		(15)
Stock-based compensation	$ (28)		$ (23)		$ (47)		$ (43)

[1] Includes allocated general and administrative expenses in our Hotel segment of $20 million and $38 million; and in our Non-Hotel segment of $10 million and $19 million for the three and six months ended June 30, 2017, respectively.

[2] Includes allocated general and administrative expenses in our Hotel segment of $19 million and $41 million; and in our Non-Hotel segment of $9 million and $18 million for the three and six months ended June 30, 2016, respectively.