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ORGANIZATION - Additional Information (Detail) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 property segment | Dec. 31, 2022
Organization Disclosure [Line Items] |  |
Number of reportable segments | segment | 3 |
BetMGM LLC |  |
Organization Disclosure [Line Items] |  |
Ownership interest (in percent) | 50.00% | 50.00%
BetMGM LLC | Entain plc |  |
Organization Disclosure [Line Items] |  |
Ownership interest (in percent) | 50.00% |
Japanese Joint Venture | JAPAN |  |
Organization Disclosure [Line Items] |  |
Ownership interest (in percent) | 50.00% |
MGM China |  |
Organization Disclosure [Line Items] |  |
Controlling interest (in percent) | 56.00% |
Number of integrated casino | property | 2 |

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