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Stockholders' Equity - Summary of Net Income Attributable to and Transfers from Noncontrolling Interest, Which Shows Effects of Changes in Company's Ownership Interest in a Subsidiary (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Stockholders Equity Note [Line Items] |  |  |
Net income (loss) attributable to MGM Resorts International | $ 1,254,370 | $ (1,032,724) | $ 2,049,146
Transfers from/(to) noncontrolling interest: |  |  |
MGP Class A share issuance | 3,240 | 646 | 1,512
Redemption of Operating Partnership units | 176,659 | 92,632 | 0
Other | (5,062) | (1,759) | (935)
Net transfers from noncontrolling interest | 274,771 | 149,145 | 152,034
Change from net income (loss) attributable to MGM Resorts International and transfers to noncontrolling interest | 1,529,141 | (883,579) | 2,201,180
Empire City |  |  |
Transfers from/(to) noncontrolling interest: |  |  |
Net transfers from noncontrolling interest | 0 | 0 | (18,718)
Park MGM |  |  |
Transfers from/(to) noncontrolling interest: |  |  |
Net transfers from noncontrolling interest | 0 | 0 | (1,968)
Northfield OpCo |  |  |
Transfers from/(to) noncontrolling interest: |  |  |
Net transfers from noncontrolling interest | 0 | 0 | 21,679
MGM Growth Properties LLC | Class A shares |  |  |
Transfers from/(to) noncontrolling interest: |  |  |
MGP Class A share issuance | 103,174 | 64,834 | 151,976
MGP BREIT Venture |  |  |
Transfers from/(to) noncontrolling interest: |  |  |
Net transfers from noncontrolling interest | $ 0 | $ (6,562) | $ 0

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