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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 20, 2005 | Aug. 31, 2018 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2016
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Amortization expense related to intangible assets |  |  |  | $ 194 | $ 192 | $ 176 |
License [Member] | Maryland [Member] |  |  |  |  |  |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Consideration paid for license fee |  |  |  |  |  |  | $ 22
Estimated useful life of intangible assets |  |  |  |  |  |  | 15 years
License [Member] | Massachusetts [Member] |  |  |  |  |  |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Consideration paid for license fee |  | $ 85 |  |  |  |  |
Estimated useful life of intangible assets |  | 15 years |  |  |  |  |
MGM Grand Paradise [Member] | Extension Agreement [Member] |  |  |  |  |  |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Extended expiration date of agreement |  |  | Jun. 26, 2022 |  |  |  |
Contract extension premium paid |  |  | $ 25 |  |  |  |
Contract extension fee paid |  |  | $ 2 |  |  |  |
MGM Grand Paradise [Member] | Gaming Sub-concession [Member] |  |  |  |  |  |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated remaining useful life of gaming subconcession | 15 years |  |  |  |  |  |

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