Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Total revenues		$ 731	$ 733	$ 1,399	$ 1,417
Operating expenses
Other property-level		50	51	103	102
Management and franchise fees		39	39	72	73
Depreciation and amortization		69	73	139	143
Corporate general and administrative		15	16	31	30
Other		18	15	35	28
Total expenses		589	610	1,172	1,200
Gain on sales of assets, net		7		96
Operating income		149	123	323	217
Interest income		1	1	2	1
Interest expense		(31)	(31)	(62)	(61)
Equity in earnings from investments in affiliates		8	8	12	12
Loss on foreign currency transactions		(4)	(4)	(3)	(3)
Other gain (loss), net		108	(1)	108	(1)
Income before income taxes		231	96	380	165
Income tax (expense) benefit		(13)	19	(13)	2,300
Net income		218	115	367	2,465
Net income attributable to noncontrolling interests		(2)	(3)	(1)	(3)
Net income attributable to stockholders		216	112	366	2,462
Other comprehensive income, net of tax benefit (expense):
Currency translation adjustment, net of tax of $1, $0, $1, and $0			7	37	14
Total other comprehensive income			7	37	14
Comprehensive income		218	122	404	2,479
Comprehensive income attributable to noncontrolling interests		(2)	(3)	(1)	(3)
Comprehensive income attributable to stockholders		$ 216	$ 119	$ 403	$ 2,476
Earnings per share:
Earnings per share - Basic	[1]	$ 1.07	$ 0.52	$ 1.77	$ 11.79
Earnings per share - Diluted	[1]	$ 1.07	$ 0.52	$ 1.77	$ 11.48
Weighted average shares outstanding - Basic		200	214	205	208
Weighted average shares outstanding - Diluted		201	215	206	214
Dividends declared per common share		$ 0.88	$ 0.43	$ 1.31	$ 0.86
Rooms [Member]
Revenues
Total revenues		$ 451	$ 469	$ 869	$ 901
Operating expenses
Expenses		112	118	224	231
Food and Beverage [Member]
Revenues
Total revenues		205	200	388	392
Operating expenses
Expenses		131	132	257	263
Ancillary Hotel [Member]
Revenues
Total revenues		58	48	108	95
Other [Member]
Revenues
Total revenues		17	16	34	29
Other Departmental and Support [Member]
Operating expenses
Expenses		$ 155	$ 166	$ 311	$ 330

[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 six months.