Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Total revenues		$ 652	$ 688	$ 2,051	$ 2,105
Operating expenses
Other property-level		54	55	157	157
Management and franchise fees		32	34	104	107
Casualty (gain) loss and impairment loss, net		(1)	2	(1)	2
Depreciation and amortization		69	74	208	217
Corporate general and administrative		16	15	47	45
Other		19	18	54	46
Total expenses		570	599	1,742	1,799
Gain on sales of assets, net		2		98
Operating income		84	89	407	306
Interest income		2	1	4	2
Interest expense		(32)	(32)	(94)	(93)
Equity in earnings from investments in affiliates		4	6	16	18
Loss on foreign currency transactions		(1)	(1)	(4)	(4)
Other (loss) gain, net		(2)	(2)	106	(3)
Income before income taxes		55	61	435	226
Income tax benefit (expense)			44	(13)	2,344
Net income		55	105	422	2,570
Net income attributable to noncontrolling interests		(3)	(2)	(4)	(5)
Net income attributable to stockholders		52	103	418	2,565
Other comprehensive (loss) income, net of tax expense:
Currency translation adjustment, net of tax expense of $1, $0, $2, and $0		(1)	8	36	22
Total other comprehensive (loss) income		(1)	8	36	22
Comprehensive income		54	113	458	2,592
Comprehensive income attributable to noncontrolling interests		(3)	(2)	(4)	(5)
Comprehensive income attributable to stockholders		$ 51	$ 111	$ 454	$ 2,587
Earnings per share:
Earnings per share - Basic	[1]	$ 0.26	$ 0.48	$ 2.04	$ 12.16
Earnings per share - Diluted	[1]	$ 0.26	$ 0.48	$ 2.04	$ 11.94
Weighted average shares outstanding - Basic		200	214	204	210
Weighted average shares outstanding - Diluted		201	215	205	214
Dividends declared per common share		$ 0.43	$ 0.43	$ 1.74	$ 1.29
Rooms [Member]
Revenues
Total revenues		$ 429	$ 460	$ 1,298	$ 1,361
Operating expenses
Expenses		113	119	337	350
Food and Beverage [Member]
Revenues
Total revenues		144	160	532	552
Operating expenses
Expenses		111	120	368	383
Ancillary Hotel [Member]
Revenues
Total revenues		60	50	168	145
Other [Member]
Revenues
Total revenues		19	18	53	47
Other Departmental and Support [Member]
Operating expenses
Expenses		$ 157	$ 162	$ 468	$ 492

[1] Per share amounts are calculated based on unrounded numbers and are calculated independently for each period presented; therefore, the sum of the quarterly EPS does not equal the EPS for the nine months.