Business Segment Information - Reconciliation of Consolidated Hotel Revenue to Condensed Consolidated Revenue and Hotel Adjusted EBITDA to Net Income (Detail) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 672			$ 652			$ 2,034	$ 2,051
Hotel Adjusted EBITDA	183			171			573	573
Casualty (loss) gain and impairment loss, net	(8)			1			(8)	1
Depreciation and amortization expense	(61)			(69)			(184)	(208)
Corporate general and administrative expense	(14)			(16)			(47)	(47)
Acquisition costs	(59)						(65)
Other operating expenses	(23)			(19)			(61)	(54)
Gain on sales of assets, net	1			2			20	98
Interest income	2			2			5	4
Interest expense	(33)			(32)			(98)	(94)
Equity in earnings from investments in affiliates	3			4			18	16
Loss on foreign currency transactions	(2)			(1)			(2)	(4)
Income tax expense							(12)	(13)
Other gain (loss), net	1			(2)			1	106
Other items	(3)			(5)			(9)	(9)
Net income	9	$ 84	$ 97	55	$ 218	$ 149	190	422
Total consolidated hotel revenue [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	650			633			1,975	1,998
Other [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 22			$ 19			$ 59	$ 53