Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Contract With Customer, Liability [Roll Forward]
Balance as of beginning of period	$ 200	$ 200	$ 192	$ 149
Amount recognized during the period	(192)	(556)
Amount accrued during the period	200	607
Balance of end of period	200	200	192	149
Deferred credits and other liabilities	8	8		5
Caesars Rewards
Contract With Customer, Liability [Roll Forward]
Balance as of beginning of period	78	78	71	66
Amount recognized during the period	(34)	(99)
Amount accrued during the period	41	111
Balance of end of period	78	78	71	66
Caesars rewards and customer advances recognized value	5	30
Customer Advance Deposits
Contract With Customer, Liability [Roll Forward]
Balance as of beginning of period	122	122	121	83
Amount recognized during the period	(158)	(457)
Amount accrued during the period	159	496
Balance of end of period	122	122	$ 121	$ 83
Caesars rewards and customer advances recognized value	$ 3	$ 65