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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)

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