Stock-Based Compensation - Stock Option Grants and Exercises (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Caesars Interactive Entertainment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted				377
Weighted Average Exercise Price per Share (1)				$ 19,166.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	[1]			$ 5,404.93
Number of options exercised				(909)
Proceeds from Stock Options Exercised				$ 2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value				$ 13
Parent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		8,360,365	9,227,890
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price		$ 10.63	$ 10.36
Options Outstanding, Weighted Average Remaining Contractual Term		2 years 9 months 18 days	3 years 10 months 24 days
Number of options exercised		(746,332)	(1,249,640)	(11,101)
Weighted Average Exercise Price Exercised		$ 7.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period		46,519
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price		$ 8.64
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period		74,674
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price		$ 9.97
Vested and expected to vest as of December 31, 2018		8,360,365
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price		$ 10.63
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term		2 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value		$ 0	$ 35
Exercisable as of December 31, 2018		7,338,503
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price		$ 9.12
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		2 years 8 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value		$ 0
Proceeds from Stock Options Exercised	[2]	6	8	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	[2]	$ 3	$ 7	$ 0

[1] 1)  Represents the weighted-average grant date fair value per option, using the Monte Carlo simulation option-pricing model for performance-based options, and the Black-Scholes option-pricing model for time-based options.  Assumptions Used to Estimate CIE Option Value   Year Ended December 31, 2016 Expected range of volatility 40.5% - 44.6%
Expected dividend yield — % Expected range of term (in years) 0.8 - 4.2
Risk-free interest rate range 0.5% - 1.2%

[2] 2016 amounts are immaterial.