Segment Reporting Segment Reporting - Property EBITDA - By Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	$ (1,442)	$ (2,077)	$ (1,988)	$ (2,385)
Net income attributable to noncontrolling interests	16	34	38	68
Discontinued operations, net of income taxes		(25)		(58)
Income tax (benefit)/provision	31	3	103	10
Restructuring of CEOC and other	1,410	2,026	1,873	2,263
Interest expense	142	150	289	301
Depreciation and amortization	96	103	198	215
Corporate expense	40	40	73	81
Other operating costs	18	20	15	42
CIE stock-based compensation		30		43
Property EBITDA	311	304	601	580
Operating Segments | CERP
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	15	8	21	(8)
Net income attributable to noncontrolling interests	0	0	0	0
Discontinued operations, net of income taxes		0		0
Income tax (benefit)/provision	10	4	16	(2)
Restructuring of CEOC and other	2	0	2	1
Interest expense	91	99	189	198
Depreciation and amortization	54	60	110	133
Corporate expense	13	10	23	21
Other operating costs	1	3	2	5
CIE stock-based compensation		0		0
Property EBITDA	186	184	363	348
Operating Segments | CGP
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	21	13	29	43
Net income attributable to noncontrolling interests	0	3	(1)	7
Discontinued operations, net of income taxes		(25)		(58)
Income tax (benefit)/provision	0	(3)	0	(4)
Restructuring of CEOC and other	(5)	0	(5)	(1)
Interest expense	47	48	95	100
Depreciation and amortization	42	44	88	83
Corporate expense	9	8	16	15
Other operating costs	10	2	16	3
CIE stock-based compensation		30		43
Property EBITDA	124	120	238	231
Other
Segment Reporting Information [Line Items]
Net income/(loss) attributable to company	(1,478)	(2,098)	(2,038)	(2,420)
Net income attributable to noncontrolling interests	16	31	39	61
Discontinued operations, net of income taxes		0		0
Income tax (benefit)/provision	21	2	87	16
Restructuring of CEOC and other	1,413	2,026	1,876	2,263
Interest expense	4	3	5	3
Depreciation and amortization	0	(1)	0	(1)
Corporate expense	19	22	35	46
Other operating costs	7	15	(3)	34
CIE stock-based compensation		0		0
Property EBITDA	2	0	1	2
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)	0	(1)	(1)
Other operating costs	0	0	0	0
CIE stock-based compensation		0		0
Property EBITDA	$ (1)	$ 0	$ (1)	$ (1)