Segment Reporting Segment Reporting - Adjusted EBITDA - By Segment (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		$ 29	$ (1,432)	$ (5)	$ (1,939)
Net loss attributable to noncontrolling interests		0	0	0	(1)
Income tax provision (1)	[1],[2]	(36)	32	(23)	79
Restructuring and support expenses and other	[3],[4]	(45)	1,407	(229)	1,871
Interest expense		334	142	664	289
Depreciation and amortization		268	96	548	198
Other operating costs	[5]	33	18	99	17
Stock-based compensation expense		20	9	38	18
Other items (4)	[6]	20	18	49	33
Adjusted EBITDA		623	290	1,141	565
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		(126)	(1,622)	(182)	(2,299)
Net loss attributable to noncontrolling interests		(1)		(1)	0
Income tax provision (1)	[1],[2]	(36)	32	(23)	79
Restructuring and support expenses and other	[3],[4]	(47)	1,404	(227)	1,868
Interest expense		115	132	229	267
Depreciation and amortization		15	1	32	3
Other operating costs	[5]	30	8	62	0
Stock-based compensation expense		15	8	29	16
Other items (4)	[6]	17	14	44	27
Adjusted EBITDA		(18)	(23)	(37)	(39)
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
Income tax provision (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	1	0
Stock-based compensation expense		0	0	0	0
Other items (4)	[6]	(1)	0	(1)	0
Adjusted EBITDA		0	0	0	0
Las Vegas, NV [Member] | Operating Segments
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		164	150	236	297
Net loss attributable to noncontrolling interests		0		0	0
Income tax provision (1)	[1],[2]	0	0	0	0
Restructuring and support expenses and other	[3],[4]	2	3	0	3
Interest expense		80	3	158	8
Depreciation and amortization		132	74	274	153
Other operating costs	[5]	1	9	29	15
Stock-based compensation expense		2	0	4	1
Other items (4)	[6]	2	3	3	4
Adjusted EBITDA		383	242	704	481
Other U.S. [Member] | Operating Segments
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		(9)	40	(59)	63
Net loss attributable to noncontrolling interests		1		1	(1)
Income tax provision (1)	[1],[2]	0	0	0	0
Restructuring and support expenses and other	[3],[4]	0	0	(2)	0
Interest expense		139	7	277	14
Depreciation and amortization		121	21	242	42
Other operating costs	[5]	1	1	7	2
Stock-based compensation expense		3	1	5	1
Other items (4)	[6]	2	1	3	2
Adjusted EBITDA		$ 258	$ 71	$ 474	$ 123

[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.