Basis of Presentation and Principles of Consolidation Basis of Presentation and Principles of Consolidation - Reconciliation of Net Revenues and Net Income/(Loss) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Combination, Separately Recognized Transactions [Line Items]
Net revenues		$ 2,119	$ 1,008	$ 4,091	$ 1,974
Net loss		$ 29	(1,432)	$ (5)	(1,940)
Scenario, Previously Reported [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net revenues			1,002		1,965
Net loss			(1,434)		(1,942)
Caesars Entertainment Corporation [Member] | Scenario, Previously Reported [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net revenues			1,002		1,965
Net loss			(1,426)		(1,950)
Caesars Acquisition Company [Member] | Scenario, Previously Reported [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net revenues			0		0
Net loss			(3)		(1)
Consolidation, Eliminations [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net loss			(5)		9
Consolidation, Eliminations [Member] | Scenario, Previously Reported [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net revenues			0		0
Net loss			(5)		9
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Restatement Adjustment [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net revenues	[1]		6		9
Net loss	[1]		$ 2		$ 2

[1] See Adoption of New Revenue Recognition Standard above.