Geographic and 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								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 810	$ 672	$ 703	$ 659	$ 686	$ 652	$ 731	$ 668	$ 2,844	$ 2,737	$ 2,791
Hotel Adjusted EBITDA									802	761	758
Casualty gain (loss) and impairment loss, net									18	1	(26)
Depreciation and amortization expense									(264)	(277)	(288)
Corporate general and administrative expense									(62)	(65)	(68)
Acquisition costs									(70)
Other operating expenses									(78)	(73)	(63)
Gain on sales of assets, net									19	96	1
Interest income									6	6	2
Interest expense									(140)	(127)	(124)
Equity in earnings from investments in affiliates									14	18	40
Loss on foreign currency transactions									(1)	(3)	(4)
Income tax (expense) benefit									(35)	(23)	2,346
Other gain, net									46	102
Other items									(16)	(11)	(7)
Net income	$ 126	$ 9	$ 84	$ 97	$ 55	$ 55	$ 218	$ 149	316	477	2,631
Total consolidated hotel revenue [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues									2,767	2,665	2,727
Other [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues									$ 77	$ 72	$ 64