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Related Party Transactions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 01, 2019 | Mar. 07, 2019 | Jan. 29, 2019 | Mar. 31, 2019 | Jan. 31, 2019 | Mar. 31, 2019 | Mar. 31, 2018
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Total purchase price |  | $ 638 |  |  |  |  |
Purchase price in cash |  | 606 |  |  |  |  |
Master Lease [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Increase in annual rent payment |  | $ 50 |  |  |  |  |
Annual fixed rent, percentage |  | 90.00% |  |  |  |  |
Increase in annual rent per year, percentage |  | 2.00% |  |  |  |  |
Annual rent payments under master lease of properties | $ 946 |  |  | $ 870 | $ 770 |  |
Empire City [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Total purchase price |  |  | $ 865 |  |  |  |
Empire City [Member] | Developed Real Property [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Total purchase price |  |  |  |  | 634 |  |
Liabilities incurred for acquisition |  |  |  |  | 246 |  |
Increase in annual rent payment |  |  |  |  | $ 50 |  |
Annual fixed rent, percentage |  |  |  |  | 90.00% |  |
Increase in annual rent per year, percentage |  |  |  |  | 2.00% |  |
Northfield OpCo [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Total purchase price | 301 |  |  |  |  |  |
Northfield OpCo [Member] | Master Lease [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Increase in annual rent payment | $ 60 |  |  |  |  |  |
Annual fixed rent, percentage | 90.00% |  |  |  |  |  |
Increase in annual rent per year, percentage | 2.00% |  |  |  |  |  |
MGM Branding and Development [Member] | Ms Ho Pansy Catilina Chiu King [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Distribution made to noncontrolling interests |  |  |  |  |  | $ 5 | $ 10
MGM Growth Properties LLC [Member] | Northfield OpCo [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Redemption of operating partnership units | 9 |  |  |  |  |  |

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