Geographic and Business Segment Information - Reconciliation of Revenues from Consolidated Hotels to Condensed Combined Consolidated Amounts and Net (Loss) Income to Hotel Adjusted EBITDA (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 852	$ 2,844	$ 2,737
Net (loss) income	(1,444)	316	477
Impairment loss and casualty (gain) loss, net	696	(18)	(1)
Depreciation and amortization	298	264	277
Corporate general and administrative expense	61	61	64
Acquisition costs	10	70
Other operating expenses	36	78	73
Gain on sales of assets, net	(62)	(19)	(96)
Interest income	(2)	(6)	(6)
Interest expense	213	140	127
Equity in losses (earnings) from investments in affiliates	22	(14)	(18)
Income tax (benefit) expense	(6)	35	23
Other loss (gain), net	15	(45)	(99)
Severance expense	33	2	2
Other items	12	15	10
Hotel Adjusted EBITDA	(147)	802	761
Total consolidated hotel revenue [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	823	2,767	2,665
Other [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 29	$ 77	$ 72