Segment Reporting - Adjusted EBITDA (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars		$ 198	$ 110	$ 29	$ (34)	$ 2,004	$ (433)	$ (1,432)	$ (507)	$ 303		$ (368)		$ (3,049)
Net income/(loss) attributable to noncontrolling interests										1		(7)		(29)
Income from discontinued operations										0		0		(3,380)
Income tax benefit/(provision)	[1],[2]									(121)		(1,995)		327
Gain on deconsolidation of subsidiaries										0		(31)		0
Restructuring and support expenses and other												2,028		5,729
Loss on extinguishment of debt										1		232		0
Other income/(losses)										(791)	[3]	(95)	[3]	29
Interest expense										1,346		773		599
Depreciation and amortization										1,145		626		439
Impairment of goodwill										43		0		0
Impairment of tangible and other intangible assets										35		0		0
Other operating costs										155	[3]	65	[3]	91	[4]
Stock-based compensation expense										79		43		43
Other items (4)										112	[4]	90	[4]	81	[5]
Adjusted EBITDA										2,308		1,361		1,069
Caesars Interactive Entertainment [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense														189
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars										33		(749)		(3,684)
Net income/(loss) attributable to noncontrolling interests										(1)		0		(33)
Income from discontinued operations														(3,380)
Income tax benefit/(provision)	[1],[2]									(121)		(1,993)		328
Gain on deconsolidation of subsidiaries												0
Restructuring and support expenses and other												1,851		5,729
Loss on extinguishment of debt										1		215
Other income/(losses)										(786)	[3]	(90)	[3]	29
Interest expense										463		555		548
Depreciation and amortization										62		20		5
Impairment of goodwill										26
Impairment of tangible and other intangible assets										9
Other operating costs										82	[3]	37	[3]	83	[4]
Stock-based compensation expense										61		36		38
Other items (4)										103	[4]	74	[4]	77	[5]
Adjusted EBITDA										(68)		(44)		(71)
Corporate and Other [Member] | Caesars Interactive Entertainment [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense														189
Operating Segments [Member] | Las Vegas, NV [Member]
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars										392		484		506
Net income/(loss) attributable to noncontrolling interests										0		0		0
Income from discontinued operations														0
Income tax benefit/(provision)	[1],[2]									0		0		(1)
Gain on deconsolidation of subsidiaries												0
Restructuring and support expenses and other												0		0
Loss on extinguishment of debt										0		4
Other income/(losses)										(3)	[3]	(4)	[3]	0
Interest expense										327		65		21
Depreciation and amortization										582		420		344
Impairment of goodwill										0
Impairment of tangible and other intangible assets										0
Other operating costs										52	[3]	25	[3]	8	[4]
Stock-based compensation expense										8		4		3
Other items (4)										4	[4]	9	[4]	0	[5]
Adjusted EBITDA										1,362		1,007		881
Operating Segments [Member] | Las Vegas, NV [Member] | Caesars Interactive Entertainment [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense														0
Operating Segments [Member] | Other U.S. [Member]
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars										(122)		(103)		129
Net income/(loss) attributable to noncontrolling interests										2		(7)		4
Income from discontinued operations														0
Income tax benefit/(provision)	[1],[2]									0		(2)		0
Gain on deconsolidation of subsidiaries												(31)
Restructuring and support expenses and other												177		0
Loss on extinguishment of debt										0		13
Other income/(losses)										(2)	[3]	(1)	[3]	0
Interest expense										556		153		30
Depreciation and amortization										501		186		90
Impairment of goodwill										17
Impairment of tangible and other intangible assets										26
Other operating costs										21	[3]	3	[3]	0	[4]
Stock-based compensation expense										10		3		2
Other items (4)										5	[4]	7	[4]	4	[5]
Adjusted EBITDA										1,014		398		259
Operating Segments [Member] | Other U.S. [Member] | Caesars Interactive Entertainment [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense														0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net income/(loss) attributable to Caesars										0		0		0
Net income/(loss) attributable to noncontrolling interests										0		0		0
Income from discontinued operations														0
Income tax benefit/(provision)	[1],[2]									0		0		0
Gain on deconsolidation of subsidiaries												0
Restructuring and support expenses and other												0		0
Loss on extinguishment of debt										0		0
Other income/(losses)										0	[3]	0	[3]	0
Interest expense										0		0		0
Depreciation and amortization										0		0		0
Impairment of goodwill										0
Impairment of tangible and other intangible assets										0
Other operating costs										0	[3]	0	[3]	0	[4]
Stock-based compensation expense										0		0		0
Other items (4)										0	[4]	0	[4]	0	[5]
Adjusted EBITDA										$ 0		$ 0		0
Intersegment Eliminations [Member] | Caesars Interactive Entertainment [Member]
Segment Reporting Information [Line Items]
Stock-based compensation expense														$ 0

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

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

[3] (2) Amounts include changes in fair value of the derivative liability related to the conversion option of the CEC Convertible Notes and the disputed claims liability as well as interest and dividend income.

[4] (3) Amounts primarily represent costs incurred in connection with development activities and reorganization activities, and/or recoveries associated with such items, including acquisition and integration costs, contract exit fees including exiting the fully bundled sales system of NV Energy for electric service at our Nevada properties, lease termination costs, gains and losses on asset sales, weather related property closure costs, demolition costs primarily at our Las Vegas properties for renovations, and project opening costs.

[5] (4) Amounts include other add-backs and deductions to arrive at Adjusted EBITDA but not separately identified such as professional and consulting services, sign-on and retention bonuses, business optimization expenses for IT transformation, severance and relocation costs, litigation awards and settlements, permit remediation costs, and costs associated with CEOC’s restructuring and related litigation.