Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019		Jun. 30, 2019		Mar. 31, 2019	[3]	Dec. 31, 2018
Contract with Customer, Liability	$ 192	[1],[2]	$ 192	[1],[2]	$ 166		$ 149	[4]
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized	(180)	[5]	(364)	[6]
Contract with Customer, Liability, Current	206		407
Contract with Customer, Liability, Noncurrent	8		8				5
Customer Loyalty Program [Member]
Contract with Customer, Liability	71	[1],[2]	71	[1],[2]	67		66	[4]
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized	(33)	[5]	(65)	[6]
Contract with Customer, Liability, Current	37		70
Contract with Customer, Liability, Revenue Recognized	10		25
Customer Advances [Member]
Contract with Customer, Liability	121	[1],[2]	121	[1],[2]	$ 99		$ 83	[4]
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized	(147)	[5]	(299)	[6]
Contract with Customer, Liability, Current	169		337
Contract with Customer, Liability, Revenue Recognized	$ 11		$ 62

[1] ⁽³⁾  $8 million included within Deferred credits and other liabilities as of June 30, 2019. Includes lodging arrangement and convention contract liabilities accounted for under ASC 842. See Note 7 for further details.

[2] ⁽³⁾  $8 million included within Deferred credits and other liabilities as of June 30, 2019. Includes lodging arrangement and convention contract liabilities accounted for under ASC 842. See Note 7 for further details.

[3] ⁽¹⁾  Includes lodging arrangement and convention contract liabilities accounted for under ASC 842. See Note 7 for further details.

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

[5] ⁽²⁾  Includes $10 million for Caesars Rewards and $11 million for Customer Advances recognized from the March 31, 2019 Contract liability balances.

[6] ⁽²⁾  Includes $25 million for Caesars Rewards and $62 million for Customer Advances recognized from the December 31, 2018 Contract liability balances.