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Acquisitions, Purchase Price Accounting and Pro forma Information - Unaudited Pro Forma Information - (Details) - USD ($)
$ in Millions
 5 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
William Hill        
Business Acquisition [Line Items]        
Net revenues   $ 9,696 $ 3,834  
Net loss   (893) (1,991)  
Net loss attributable to Caesars   (896) (1,989)  
Horseshoe Baltimore        
Business Acquisition [Line Items]        
Net revenues   9,693 3,764  
Net loss   (1,049) (1,784)  
Net loss attributable to Caesars   $ (1,056) (1,778)  
Caesars Entertainment Corporation        
Business Acquisition [Line Items]        
Net revenues $ 2,100   5,926 $ 10,534
Net loss $ (1,200)   (2,738) (1,069)
Net loss attributable to Caesars     $ (2,670) $ (1,065)