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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of ownership interest |  |  | 100.00% |  |
Percentage of minority interest | 43.30% |  | 43.30% |  |
Total assets | $ 37,471,285 |  | $ 37,471,285 |  | $ 33,876,356
Investments in and advances to unconsolidated affiliates | 1,468,495 |  | 1,468,495 |  | $ 822,366
Commissions, complimentaries and other incentives | 71,000 | $ 601,000 | 526,000 | $ 1,200,000 |
Food and Beverage Revenue [Member] |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Lease revenue | 5,000 | 13,000 | 15,000 | 25,000 |
Entertainment Retail and Other Revenue [Member] |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Lease revenue | 14,000 | $ 22,000 | $ 33,000 | $ 44,000 |
Bellagio Blackstone Real Estate Income Trust [Member] |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of ownership interest |  |  | 5.00% |  |
Investments in and advances to unconsolidated affiliates | 60,000 |  | $ 60,000 |  |
MGM Growth Properties LLC [Member] |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Total assets | 10,800,000 |  | 10,800,000 |  |
Total liabilities | $ 4,500,000 |  | $ 4,500,000 |  |

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