Condensed Consolidated Statements of Comprehensive Loss - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Total revenues		$ 323	$ 42	$ 488	$ 641
Operating expenses
Other property-level		52	56	100	116
Management fees		14	0	21	25
Impairment loss and casualty gain, net		5	0	5	694
Depreciation and amortization		71	75	145	150
Corporate general and administrative		16	14	34	30
Other		13	4	20	25
Total expenses		373	243	661	1,541
Gain on sales of assets, net		6	1	6	63
Operating loss		(44)	(200)	(167)	(837)
Interest income		0	1	0	2
Interest expense		(66)	(50)	(129)	(90)
Equity in losses from investments in affiliates		(2)	(8)	(6)	(9)
Other loss, net		(2)	(1)	(2)	(3)
Loss before income taxes		(114)	(258)	(304)	(937)
Income tax expense		0	(3)	(1)	(13)
Net loss		(114)	(261)	(305)	(950)
Net (income) loss attributable to noncontrolling interests		(2)	(2)	(1)	(3)
Net loss attributable to stockholders		(116)	(259)	(306)	(947)
Other comprehensive (loss) income, net of tax expense:
Currency translation adjustment, net of tax expense of $0		0	0	0	4
Change in fair value of interest rate swap, net of tax expense of $0		0	(1)	1	(7)
Total other comprehensive (loss) income		0	(1)	1	(3)
Comprehensive loss		(114)	(262)	(304)	(953)
Comprehensive (income) loss attributable to noncontrolling interests		(2)	2	(1)	3
Comprehensive loss attributable to stockholders		$ (116)	$ (260)	$ (305)	$ (950)
Loss per share:
Loss per share - Basic	[1]	$ (0.49)	$ (1.10)	$ (1.30)	$ (4.01)
Loss per share - Diluted	[1]	$ (0.49)	$ (1.10)	$ (1.30)	$ (4.01)
Weighted average shares outstanding - Basic		236	235	235	236
Weighted average shares outstanding - Diluted		236	235	236	236
Rooms [Member]
Revenues
Total revenues		$ 207	$ 21	$ 313	$ 383
Operating expenses
Expenses		59	20	94	132
Food and Beverage [Member]
Revenues
Total revenues		54	3	76	164
Operating expenses
Expenses		42	14	63	137
Ancillary Hotel [Member]
Revenues
Total revenues		50	15	79	72
Other [Member]
Revenues
Total revenues		12	3	20	22
Other Departmental and Support [Member]
Operating expenses
Expenses		$ 101	$ 60	$ 179	$ 232

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