Business Segment Information - Reconciliation of Revenues from Consolidated Hotels to Condensed Combined Consolidated Amounts and Hotel Adjusted EBITDA to Net Income (Detail) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	[1]	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues		$ 688	$ 671		$ 2,105	$ 2,057	[1]
Hotel Adjusted EBITDA		182	201		573	615	[1]
Impairment loss	[1]					(15)
Depreciation and amortization expense		(74)	(73)		(217)	(220)	[1]
Corporate and other expense		(20)	(21)		(57)	(56)	[1]
Interest income		1			2	1	[1]
Interest expense		(32)	(49)		(93)	(141)	[1]
Equity in earnings from investments in affiliates		6	6		18	16	[1]
(Loss) gain on foreign currency transactions		(1)	1		(4)
Income tax benefit (expense)		44	(26)		2,344	(79)	[1]
Loss from hurricane damage		(2)			(2)
Other gains and losses		(2)	(6)		(3)	(9)	[1]
Net income		105	37		2,570	122	[1]
Total consolidated hotel revenue [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues		685	667		2,096	2,047	[1]
Other [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues		$ 3	$ 4		$ 9	$ 10	[1]

[1] Prior to the spin-off, we had one operating and reportable segment, our ownership segment. Prior period presentation has been restated to reflect our current reportable segment.