Revenue Recognition Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Contract with Customer, Liability		$ 149	[1]	$ 131	[2]	$ 63
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized		(584)	[3]	(56)
Increase (Decrease) in Customer Loyalty Program Liability		602		15
Contract with Customer, Liability, Noncurrent		5		2
Customer Loyalty Program [Member]
Contract with Customer, Liability		66	[1]	62	[2]	0
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized		(144)	[3]	0
Increase (Decrease) in Customer Loyalty Program Liability		148		(19)
Contract with Customer, Liability, Revenue Recognized		35
Customer Advances [Member]
Contract with Customer, Liability		83	[1]	69	[2]	$ 63
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized		(440)	[3]	(56)
Increase (Decrease) in Customer Loyalty Program Liability		454		34
Contract with Customer, Liability, Revenue Recognized		$ 62
OpCo [Member]
Increase (Decrease) in Customer Loyalty Program Liability	[4]			109
OpCo [Member] | Customer Loyalty Program [Member]
Increase (Decrease) in Customer Loyalty Program Liability	[4]			81
OpCo [Member] | Customer Advances [Member]
Increase (Decrease) in Customer Loyalty Program Liability	[4]			$ 28

[1] (4) $5 million included within Deferred credits and other liabilities as of December 31, 2018.

[2] (2) $2 million included within Deferred credits and other liabilities as of December 31, 2017.

[3] (3) Includes $35 million for Caesars Rewards and $62 million for Customer Advances recognized from the December 31, 2017 Contract liability balances.

[4] (1) See Note 4 for further details relating to the acquisition of OpCo.