Segment Information - Summary of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenue	$ 421		$ 415		$ 1,164		$ 1,183
Adjusted EBITDA	114	[1]	130	[2]	294	[1]	379	[2]
Depreciation	(18)		(13)		(51)		(42)
Amortization of intangible assets	(8)		(10)		(23)		(26)
Stock-based compensation	(22)		(19)		(64)		(52)
Other non-recurring expenses							(2)
Operating income	66		88		156		257
Other income (expense), net	(3)		10		(10)		8
Income before income taxes	63		98		146		265
Provision for income taxes	(8)		(24)		(27)		(70)
Net income	55		74		119		195
Operating Segments | Hotel Segment
Segment Reporting Information [Line Items]
Revenue	320		340		939		1,003
Adjusted EBITDA	99	[1]	121	[2]	309	[1]	377	[2]
Operating Segments | Non-Hotel Segment
Segment Reporting Information [Line Items]
Revenue	101		75		225		180
Adjusted EBITDA	15	[1]	9	[2]	(15)	[1]	2	[2]
Corporate and Unallocated
Segment Reporting Information [Line Items]
Depreciation	(18)		(13)		(51)		(42)
Amortization of intangible assets	(8)		(10)		(23)		(26)
Stock-based compensation	$ (22)		$ (19)		$ (64)		(52)
Other non-recurring expenses							$ (2)

[1] Includes allocated general and administrative expenses in our Hotel segment of $21 million and $63 million; and in our Non-Hotel segment of $10 million and $28 million for the three and nine months ended September 30, 2016, respectively.

[2] Includes allocated general and administrative expenses in our Hotel segment of $23 million and $69 million; and in our Non-Hotel segment of $8 million and $23 million for the three and nine months ended September 30, 2015, respectively.