Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Contract With Customer, Liability [Roll Forward]
Beginning Balance	$ 149	$ 131	$ 63
Amount recognized from the beginning balance	(748)	(584)	(56)
Amount earned and recognized within the period	795	602	15
Ending Balance	196	149	131
Contract with customer, liability, noncurrent	18	5	2
Caesars Rewards
Contract With Customer, Liability [Roll Forward]
Beginning Balance	66	62	0
Amount recognized from the beginning balance	(145)	(144)	0
Amount earned and recognized within the period	149	148	(19)
Ending Balance	70	66	62
Contract with customer prior period balances		35	35
Customer Advance Deposits
Contract With Customer, Liability [Roll Forward]
Beginning Balance	83	69	63
Amount recognized from the beginning balance	(603)	(440)	(56)
Amount earned and recognized within the period	646	454	34
Ending Balance	$ 126	83	69
Contract with customer prior period balances		$ 72	62
OpCo
Contract With Customer, Liability [Roll Forward]
Amount earned and recognized within the period			109
OpCo | Caesars Rewards
Contract With Customer, Liability [Roll Forward]
Amount earned and recognized within the period			81
OpCo | Customer Advance Deposits
Contract With Customer, Liability [Roll Forward]
Amount earned and recognized within the period			$ 28