Segment Reporting - Condensed Statements of Operations - By Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Total contract revenues	$ 2,196	$ 2,140	$ 6,455	$ 6,153
Real estate leases	38		114
Other revenues	2	45	4	123
Revenues	2,236	2,185	6,573	6,276
Depreciation and amortization	255	295	743	843
Income/(loss) from operations	(68)	232	441	639
Interest expense	(341)	(341)	(1,033)	(1,005)
Other income/(loss)	27	109	(412)	338
Income tax benefit	22	111	111	134
Real estate leases revenue	13		42
Casino
Segment Reporting Information [Line Items]
Total contract revenues	1,131	1,102	3,340	3,147
Revenues	1,131	1,102	3,340	3,147
Food and beverage
Segment Reporting Information [Line Items]
Total contract revenues	411	408	1,216	1,182
Revenues	411	408	1,216	1,182
Rooms
Segment Reporting Information [Line Items]
Total contract revenues	409	395	1,202	1,150
Revenues	409	395	1,202	1,150
Management fees
Segment Reporting Information [Line Items]
Total contract revenues	15	16	45	46
Revenues	15	16	45	46
Reimbursed management costs
Segment Reporting Information [Line Items]
Total contract revenues	53	51	159	151
Revenues	53	51	159	151
Entertainment and other
Segment Reporting Information [Line Items]
Total contract revenues	177	168	493	477
Operating Segments | Las Vegas
Segment Reporting Information [Line Items]
Total contract revenues	939	870	2,825	2,693
Real estate leases	34		105
Other revenues	0	40	0	111
Revenues	973	910	2,930	2,804
Depreciation and amortization	121	149	368	423
Income/(loss) from operations	(155)	141	336	535
Interest expense	(82)	(87)	(248)	(245)
Other income/(loss)	0	4	2	4
Income tax benefit	0	0	0	0
Operating Segments | Las Vegas | Casino
Segment Reporting Information [Line Items]
Total contract revenues	292	249	858	817
Operating Segments | Las Vegas | Food and beverage
Segment Reporting Information [Line Items]
Total contract revenues	250	244	765	731
Operating Segments | Las Vegas | Rooms
Segment Reporting Information [Line Items]
Total contract revenues	284	271	884	833
Operating Segments | Las Vegas | Management fees
Segment Reporting Information [Line Items]
Total contract revenues	0	0	0	0
Operating Segments | Las Vegas | Reimbursed management costs
Segment Reporting Information [Line Items]
Total contract revenues	0	0	0	0
Operating Segments | Las Vegas | Entertainment and other
Segment Reporting Information [Line Items]
Total contract revenues	113	106	318	312
Operating Segments | Other U.S.
Segment Reporting Information [Line Items]
Total contract revenues	1,115	1,122	3,185	3,025
Real estate leases	4		8
Other revenues	0	3	0	8
Revenues	1,119	1,125	3,193	3,033
Depreciation and amortization	103	129	312	371
Income/(loss) from operations	194	172	468	389
Interest expense	(143)	(137)	(428)	(414)
Other income/(loss)	(2)	0	(1)	2
Income tax benefit	0	0	0	0
Operating Segments | Other U.S. | Casino
Segment Reporting Information [Line Items]
Total contract revenues	781	789	2,293	2,143
Operating Segments | Other U.S. | Food and beverage
Segment Reporting Information [Line Items]
Total contract revenues	156	158	434	431
Operating Segments | Other U.S. | Rooms
Segment Reporting Information [Line Items]
Total contract revenues	123	124	315	315
Operating Segments | Other U.S. | Management fees
Segment Reporting Information [Line Items]
Total contract revenues	0	(2)	0	0
Operating Segments | Other U.S. | Reimbursed management costs
Segment Reporting Information [Line Items]
Total contract revenues	1	1	2	2
Operating Segments | Other U.S. | Entertainment and other
Segment Reporting Information [Line Items]
Total contract revenues	54	52	141	134
Operating Segments | All Other
Segment Reporting Information [Line Items]
Total contract revenues	144	150	449	442
Real estate leases	0		1
Other revenues	2	2	4	4
Revenues	146	152	454	446
Depreciation and amortization	31	17	63	49
Income/(loss) from operations	(107)	(81)	(363)	(285)
Interest expense	(116)	(117)	(357)	(346)
Other income/(loss)	29	105	(413)	332
Income tax benefit	22	111	111	134
Operating Segments | All Other | Casino
Segment Reporting Information [Line Items]
Total contract revenues	58	64	189	187
Operating Segments | All Other | Food and beverage
Segment Reporting Information [Line Items]
Total contract revenues	5	6	17	20
Operating Segments | All Other | Rooms
Segment Reporting Information [Line Items]
Total contract revenues	2	0	3	2
Operating Segments | All Other | Management fees
Segment Reporting Information [Line Items]
Total contract revenues	16	18	46	49
Operating Segments | All Other | Reimbursed management costs
Segment Reporting Information [Line Items]
Total contract revenues	52	50	157	149
Operating Segments | All Other | Entertainment and other
Segment Reporting Information [Line Items]
Total contract revenues	11	12	37	35
Elimination
Segment Reporting Information [Line Items]
Total contract revenues	(2)	(2)	(4)	(7)
Real estate leases	0		0
Other revenues	0	0	0	0
Revenues	(2)	(2)	(4)	(7)
Depreciation and amortization	0	0	0	0
Income/(loss) from operations	0	0	0	0
Interest expense	0	0	0	0
Other income/(loss)	0	0	0	0
Income tax benefit	0	0	0	0
Elimination | Casino
Segment Reporting Information [Line Items]
Total contract revenues	0	0	0	0
Elimination | Food and beverage
Segment Reporting Information [Line Items]
Total contract revenues	0	0	0	0
Elimination | Rooms
Segment Reporting Information [Line Items]
Total contract revenues	0	0	0	0
Elimination | Management fees
Segment Reporting Information [Line Items]
Total contract revenues	(1)	0	(1)	(3)
Elimination | Reimbursed management costs
Segment Reporting Information [Line Items]
Total contract revenues	0	0	0	0
Elimination | Entertainment and other
Segment Reporting Information [Line Items]
Total contract revenues	$ (1)	$ (2)	$ (3)	$ (4)