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Organization - Additional Information (Detail) $ in Thousands, shares in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
May 18, 2020 USD ($) shares | Feb. 14, 2020 USD ($) shares | Feb. 13, 2020 shares | Feb. 29, 2020 shares | Jan. 31, 2019 shares | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) shares | Sep. 30, 2020 USD ($) Property Segment | Sep. 30, 2019 USD ($) shares | Dec. 31, 2019 USD ($)
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of minority interest |  |  |  |  |  | 43.30% |  | 43.30% |  |
Debt carrying amount |  |  |  |  |  | $ 11,504,737 |  | $ 11,504,737 |  | $ 11,271,706
Payment for purchase of common shares |  |  |  |  |  |  |  | 353,720 | $ 638,815 |
Revenues |  |  |  |  |  | 1,125,920 | $ 3,314,382 | 3,668,546 | 9,714,536 |
Gain (loss) on sales of real estate assets |  |  |  |  |  | $ 0 | $ 0 | 1,491,945 | $ 0 |
Cash proceeds for redemption |  |  |  |  |  |  |  | $ 3,205 |  |
Number of reportable segments | Segment |  |  |  |  |  |  |  | 3 |  |
CityCenter Holdings LLC As Investee [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage ownership interest |  |  |  |  |  | 50.00% |  | 50.00% |  | 50.00%
Infinity World Development Corp [Member] | CityCenter Holdings LLC As Investee [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage ownership interest |  |  |  |  |  | 50.00% |  | 50.00% |  |
Bellagio BREIT Venture [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of minority interest |  |  |  |  |  | 5.00% |  | 5.00% |  |
MGP BREIT Venture [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Partnership interest |  |  |  |  |  |  |  | 50.10% |  |
Percentage of minority interest |  |  |  |  |  | 49.90% |  | 49.90% |  |
Total consideration received from sale of real estate assets |  | $ 4,600,000 |  |  |  |  |  |  |  |
Cash received from sale of real estate assets |  | $ 2,500,000 |  |  |  |  |  |  |  |
Operating partnership equity interest |  | 50.10% |  |  |  |  |  |  |  |
Issuance of operating partnership units | shares |  | 3 |  | 3 |  |  |  |  |  |
Percentage of issuance of operating partnership units to equity value of consolidated subsidiary |  | 5.00% |  |  |  |  |  |  |  |
Reduction in lease annual rent due to modification |  | $ 133,000 |  |  |  |  |  |  |  |
MGP BREIT Venture [Member] | Term Loan B [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Debt carrying amount |  | $ 1,300,000 |  |  |  |  |  |  |  |
Blackstone Real Estate Income Trust [Member] | Class A Shareholders [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Ordinary shares acquired | shares |  | 5 |  |  |  |  |  |  |  |
Payment for purchase of common shares |  | $ 150,000 |  |  |  |  |  |  |  |
MGM Grand Las Vegas [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 2,500,000 |  |  |  |  |  |  |  |
Carrying value of real estate assets |  | 733,000 |  |  |  |  |  |  |  |
Selling cost of real estate assets |  | 27,000 |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  | 1,700,000 |  |  |  |  |  |  |  |
Mandalay Bay [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 2,100,000 |  |  |  |  |  |  |  |
Carrying value of real estate assets |  | 2,300,000 |  |  |  |  |  |  |  |
Selling cost of real estate assets |  | 10,000 |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  | $ (252,000) |  |  |  |  |  |  |  |
Subsidiary of Blackstone Real Estate Income Trust [Member] | Bellagio BREIT Venture [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  |  |  | 95.00% |  |
MGM China [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage ownership interest |  |  |  |  |  | 56.00% |  | 56.00% |  |
Number of integrated casino | Property |  |  |  |  |  |  |  | 2 |  |
Class A shares [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock voting rights |  |  |  |  |  |  |  | one vote per share |  |
Non-Guarantor MGP Subsidiaries [Member] | Class B shares [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock voting rights |  |  |  |  |  |  |  | Class B share, is entitled to an amount of votes representing a majority of the total voting power of MGP’s shares so long as the Company and its controlled affiliates’ (excluding MGP) aggregate beneficial ownership of the combined economic interests in MGP and the Operating Partnership does not fall below 30%. |  |
MGM Growth Properties LLC [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Minimum ownership percentage required for majority voting interest |  |  |  |  |  |  |  | 30.00% |  |
Partnership interest |  |  |  |  |  |  |  | 56.70% |  |
Redemptions discount percentage |  | 3.00% |  |  |  |  |  |  |  |
Operating partnership units, redeemed | shares | 30 |  |  |  |  |  |  |  |  |
Cash proceeds for redemption | $ 700,000 |  |  |  |  |  |  |  |  |
MGM Growth Properties LLC [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Cash proceeds available for redemption |  | $ 1,400,000 |  |  |  |  |  |  |  |
MGM Growth Properties LLC [Member] | Class A shares [Member] |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of operating partnership units | shares |  | 5 | 13 |  | 20 |  | 3 |  | 5 |

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