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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Income Tax Disclosure [Line Items] |  |  |  |
Effective income tax rate | 22.40% | 13.30% | 2.90% | 36.90%
Income tax expense (benefit) | $ (270,238,000) | $ 11,734,000 | $ (7,934,000) | $ 83,245,000
MGM Grand Paradise SA [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Complementary tax rate on distributions of gaming profits (as a percent) |  |  | 12.00% |
Accrued amount | 0 |  | $ 0 |
Macau [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Increase in tax credit carry forward valuation allowance |  |  | 25,000,000 |
Increase in foreign tax credit carry forward valuation allowance | $ 13,000,000 |  | 27,000,000 |
Income tax expense (benefit) |  |  | $ (6,000,000) |
Special gaming tax rate |  |  | 35.00% |
Macau [Member] | MGM Grand Paradise SA [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Complementary tax rate on distributions of gaming profits (as a percent) |  |  | 12.00% |
Macau [Member] | MGP BREIT Venture [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Income tax expense (benefit) |  |  | $ 349,000,000 |

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