Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Contract With Customer, Liability [Roll Forward]
Balance as of beginning of period	$ 177		$ 196
Amount recognized during the period	(191)
Amount deferred during the period	172
Balance of end of period	177		196
Deferred credits and other liabilities	24		18
Caesars Rewards
Contract With Customer, Liability [Roll Forward]
Balance as of beginning of period	73		70
Amount recognized during the period	(28)
Amount deferred during the period	31
Balance of end of period	73		70
Caesars rewards and customer advances recognized value			17
Customer Advance Deposits
Contract With Customer, Liability [Roll Forward]
Balance as of beginning of period	104		126
Amount recognized during the period	(163)
Amount deferred during the period	141
Balance of end of period	104		126
Caesars rewards and customer advances recognized value	$ 15	$ 15	$ 59