Segment Reporting - Adjusted EBITDA - By Segment (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		$ 110	$ (433)	$ 105	$ (2,372)
Net loss attributable to noncontrolling interests		1	(6)	1	(7)
Income tax benefit (1)	[1],[2]	(111)	(45)	(134)	34
Restructuring and support expenses and other	[3],[4]	(109)	448	(338)	2,319
Interest expense		341	120	1,005	409
Depreciation and amortization		295	150	843	348
Other operating costs	[5]	29	36	128	53
Stock-based compensation expense		17	8	55	26
Other items (4)	[6]	27	26	76	59
Adjusted EBITDA		600	304	1,741	869
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		17	(610)	(165)	(2,909)
Net loss attributable to noncontrolling interests		1	0	0	0
Income tax benefit (1)	[1],[2]	(111)	(45)	(134)	34
Restructuring and support expenses and other	[3],[4]	(105)	468	(332)	2,336
Interest expense		117	117	346	384
Depreciation and amortization		17	2	49	5
Other operating costs	[5]	11	33	73	33
Stock-based compensation expense		13	7	42	23
Other items (4)	[6]	23	23	67	50
Adjusted EBITDA		(17)	(5)	(54)	(44)
Intersegment Elimination
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		0	0	0	0
Net loss attributable to noncontrolling interests		0	0	0	0
Income tax benefit (1)	[1],[2]	0	0	0	0
Restructuring and support expenses and other	[3],[4]	0	0	0	0
Interest expense		0	0	0	0
Depreciation and amortization		0	0	0	0
Other operating costs	[5]	(1)	0	0	0
Stock-based compensation expense		0	0	0	0
Other items (4)	[6]	1	0	0	0
Adjusted EBITDA		0	0	0	0
Las Vegas, NV [Member] | Operating Segments
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		58	107	294	404
Net loss attributable to noncontrolling interests		0	0	0	0
Income tax benefit (1)	[1],[2]	0	0	0	0
Restructuring and support expenses and other	[3],[4]	(4)	0	(4)	3
Interest expense		87	0	245	8
Depreciation and amortization		149	124	423	277
Other operating costs	[5]	13	2	42	17
Stock-based compensation expense		2	1	6	2
Other items (4)	[6]	2	1	5	5
Adjusted EBITDA		307	235	1,011	716
Other U.S. | Operating Segments
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		35	70	(24)	133
Net loss attributable to noncontrolling interests		0	(6)	1	(7)
Income tax benefit (1)	[1],[2]	0	0	0	0
Restructuring and support expenses and other	[3],[4]	0	(20)	(2)	(20)
Interest expense		137	3	414	17
Depreciation and amortization		129	24	371	66
Other operating costs	[5]	6	1	13	3
Stock-based compensation expense		2	0	7	1
Other items (4)	[6]	1	2	4	4
Adjusted EBITDA		$ 310	$ 74	$ 784	$ 197

[1] (1) Taxes are recorded at the consolidated level and not estimated or recorded to our Las Vegas and Other U.S. segments.

[2] (2) Taxes are recorded at the consolidated level and not estimated or recorded to our Las Vegas and Other U.S. segments.

[3] (1) 2018 amount primarily represents a change in fair value of our derivative liability related to the conversion option of the CEC Convertible Notes; 2017 amount primarily represents CEC’s costs in connection with the restructuring of CEOC.

[4] (2) 2018 amount primarily represents a change in fair value of our derivative liability related to the conversion option of the CEC Convertible Notes; 2017 amount primarily represents CEC’s costs in connection with the restructuring of CEOC.

[5] (3) Amounts primarily represent costs incurred in connection with costs associated with the development activities and reorganization activities, and/or recoveries associated with such items.

[6] (4) Other items includes other add-backs and deductions to arrive at Adjusted EBITDA but not separately identified such as litigation awards and settlements, costs associated with CEOC’s restructuring and related litigation, severance and relocation costs, sign-on and retention bonuses, permit remediation costs, and business optimization expenses.