Segment Reporting Segment Reporting - Property EBITDA - By Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	$ (468)	$ (643)	$ (2,456)	$ (3,028)
Net income attributable to noncontrolling interests	8	648	46	716
Discontinued operations, net of income taxes		(3,293)		(3,351)
Income tax (benefit)/provision	(20)	27	83	37
Restructuring of CEOC and other	446	3,070	2,319	5,333
Interest expense	120	147	409	448
Depreciation and amortization	150	112	348	327
Corporate expense	39	39	112	120
Other operating costs	36	35	51	77
CIE stock-based compensation		145		188
Property EBITDA	311	287	912	867
Operating Segments | CERP
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	5	6	26	(2)
Net income attributable to noncontrolling interests	0	0	0	0
Discontinued operations, net of income taxes		0		0
Income tax (benefit)/provision	(5)	0	11	(2)
Restructuring of CEOC and other	(1)	(1)	1	0
Interest expense	84	99	273	297
Depreciation and amortization	86	63	196	196
Corporate expense	11	11	34	32
Other operating costs	16	0	18	5
CIE stock-based compensation		0		0
Property EBITDA	196	178	559	526
Operating Segments | CGP
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	26	3,897	55	3,940
Net income attributable to noncontrolling interests	(6)	(33)	(7)	(26)
Discontinued operations, net of income taxes		(4,019)		(4,077)
Income tax (benefit)/provision	0	(2)	0	(6)
Restructuring of CEOC and other	(25)	(1)	(30)	(2)
Interest expense	36	49	131	149
Depreciation and amortization	64	48	152	131
Corporate expense	7	6	23	21
Other operating costs	10	16	26	19
CIE stock-based compensation		145		188
Property EBITDA	112	106	350	337
Other
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	(499)	(4,546)	(2,537)	(6,966)
Net income attributable to noncontrolling interests	14	681	53	742
Discontinued operations, net of income taxes		726		726
Income tax (benefit)/provision	(15)	29	72	45
Restructuring of CEOC and other	472	3,072	2,348	5,335
Interest expense	0	(1)	5	2
Depreciation and amortization	0	1	0	0
Corporate expense	22	23	57	69
Other operating costs	10	19	7	53
CIE stock-based compensation		0		0
Property EBITDA	4	4	5	6
Eliminations
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	0	0	0	0
Net income attributable to noncontrolling interests	0	0	0	0
Discontinued operations, net of income taxes		0		0
Income tax (benefit)/provision	0	0	0	0
Restructuring of CEOC and other	0	0	0	0
Interest expense	0	0	0	0
Depreciation and amortization	0	0	0	0
Corporate expense	(1)	(1)	(2)	(2)
Other operating costs	0	0	0	0
CIE stock-based compensation		0		0
Property EBITDA	$ (1)	$ (1)	$ (2)	$ (2)