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Organization - Additional Information (Detail) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Apr. 30, 2019 | Mar. 31, 2019 USD ($) | Jan. 31, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2019 Segment | Dec. 31, 2018
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Percentage of minority interest | 31.70% |  |  |  | 31.70% |  | 31.70% |
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% | 50.00%
Las Vegas Arena Company LLC As Investee [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Percentage ownership interest | 42.50% |  |  |  | 42.50% |  | 42.50% | 42.50%
Infinity World Development Corp [Member] | CityCenter Holdings LLC As Investee [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Percentage ownership interest | 50.00% |  |  |  | 50.00% |  | 50.00% |
Anschutz Entertainment Group, Inc [Member] | Las Vegas Arena Company LLC As Investee [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Percentage ownership interest | 42.50% |  |  |  | 42.50% |  | 42.50% |
Athena Arena, LLC [Member] | Las Vegas Arena Company LLC As Investee [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Percentage ownership interest | 15.00% |  |  |  | 15.00% |  | 15.00% |
Hard Rock Rocksino Northfield Park [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Date of acquisition agreement |  |  |  |  |  |  | 2019-04 |
Class A shares [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Common stock voting rights |  |  |  |  |  |  | one vote per share |
Partnership interest |  |  |  | 69.70% |  |  |  |
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 | 68.30% | 68.80% | 69.80% | 74.60% |  |  |  |
Percentage of minority interest | 31.70% |  |  |  | 31.70% |  | 31.70% |
MGM Growth Properties LLC [Member] | Class A shares [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Partnership interest |  |  |  |  | 68.30% |  |  |
MGM China [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Percentage ownership interest |  |  |  |  |  | 56.00% |  |
MGM Grand Paradise [Member] | Extension Agreement [Member] |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |
Agreement expiration date |  |  | Mar. 31, 2020 |  |  |  |  |
Extended expiration date of agreement |  |  | Jun. 26, 2022 |  |  |  |  |
Contract extension premium paid |  |  | $ 25 |  |  |  |  |
Contract extension fee paid |  |  | $ 2 |  |  |  |  |

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