Condensed Consolidated Statements of Comprehensive Loss - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Total revenues		$ 423	$ 98	$ 911	$ 739
Operating expenses
Other property-level		51	84	151	200
Management fees		19	2	40	27
Impairment and casualty loss, net		2	2	7	696
Depreciation and amortization		68	75	213	225
Corporate general and administrative		14	13	48	42
Acquisition costs		0	9	0	10
Other		14	6	34	31
Total expenses		426	303	1,087	1,844
(Loss) gain on sales of assets, net		(11)	(1)	(5)	62
Operating loss		(14)	(206)	(181)	(1,043)
Interest income		0	0	0	2
Interest expense		(66)	(59)	(195)	(149)
Equity in losses from investments in affiliates		0	(7)	(6)	(16)
Other loss, net		(5)	(3)	(7)	(6)
Loss before income taxes		(85)	(275)	(389)	(1,212)
Income tax benefit (expense)		3	(1)	2	(14)
Net loss		(82)	(276)	(387)	(1,226)
Net (income) loss attributable to noncontrolling interests		(4)	0	(5)	3
Net loss attributable to stockholders		(86)	(276)	(392)	(1,223)
Other comprehensive income (loss) net of tax expense:
Currency translation adjustment, net of tax expense of $0		0	1	0	4
Change in fair value of interest rate swap, net of tax expense of $0		1	0	2	(6)
Loss from interest rate swap reclassified into earnings		2	0	2	0
Total other comprehensive income (loss)		3	1	4	(2)
Comprehensive loss		(79)	(275)	(383)	(1,228)
Comprehensive loss attributable to noncontrolling interests		(4)		(5)	3
Comprehensive loss attributable to stockholders		$ (83)	$ (275)	$ (388)	$ (1,225)
Loss per share:
Loss per share - Basic	[1]	$ (0.36)	$ (1.17)	$ (1.66)	$ (5.19)
Loss per share - Diluted	[1]	$ (0.36)	$ (1.17)	$ (1.66)	$ (5.19)
Weighted average shares outstanding - Basic		236	235	236	236
Weighted average shares outstanding - Diluted		236	235	236	236
Rooms [Member]
Revenues
Total revenues		$ 274	$ 70	$ 587	$ 453
Operating expenses
Expenses		76	30	170	162
Food and Beverage [Member]
Revenues
Total revenues		76	10	152	174
Operating expenses
Expenses		63	18	126	155
Ancillary Hotel [Member]
Revenues
Total revenues		58	15	137	87
Other [Member]
Revenues
Total revenues		15	3	35	25
Other Departmental and Support [Member]
Operating expenses
Expenses		$ 119	$ 64	$ 298	$ 296

[1] Per share amounts are calculated based on unrounded numbers and are calculated independently for each period presented.