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Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Income Attributable to MGM Resorts International by Component (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance | $ 11,217,865 | $ 10,469,791 | $ 10,469,791
Ending Balance | 10,954,721 | 11,217,865 | 10,954,721
Empire City MGP [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  | 5,027 |
MGM Growth Properties LLC [Member] | Class A Shareholders [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Share issuance | 62,199 | 528,843 |
Park MGM [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  | 528 |
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | (18,872) | (18,872)
Other comprehensive income (loss) before reclassifications |  |  | 13,975
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense |  |  | 0
Other |  |  | 0
Other comprehensive income (loss), net of tax |  |  | 13,975
Less: Other comprehensive (income) loss attributable to noncontrolling interest |  |  | (6,127)
Ending Balance | (11,024) |  | (11,024)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest | Empire City MGP [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 0
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest | MGM Growth Properties LLC [Member] | Class A Shareholders [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Share issuance |  |  | 0
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest | Park MGM [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 0
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest | Northfield OpCo [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 0
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | 9,144 | 9,144
Other comprehensive income (loss) before reclassifications |  |  | (36,007)
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense |  |  | (3,614)
Other |  |  | 0
Other comprehensive income (loss), net of tax |  |  | (39,621)
Less: Other comprehensive (income) loss attributable to noncontrolling interest |  |  | 14,364
Ending Balance | (16,113) |  | (16,113)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest | Empire City MGP [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 0
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest | MGM Growth Properties LLC [Member] | Class A Shareholders [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Share issuance |  |  | 0
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest | Park MGM [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 0
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest | Northfield OpCo [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 0
Accumulated Other Adjustment Including Portion Attributable To Noncontrolling Interest |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | 1,172 | 1,172
Other comprehensive income (loss) before reclassifications |  |  | 0
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense |  |  | 0
Other |  |  | (95)
Other comprehensive income (loss), net of tax |  |  | (365)
Less: Other comprehensive (income) loss attributable to noncontrolling interest |  |  | 0
Ending Balance | 807 |  | 807
Accumulated Other Adjustment Including Portion Attributable To Noncontrolling Interest | Empire City MGP [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 195
Accumulated Other Adjustment Including Portion Attributable To Noncontrolling Interest | MGM Growth Properties LLC [Member] | Class A Shareholders [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Share issuance |  |  | (669)
Accumulated Other Adjustment Including Portion Attributable To Noncontrolling Interest | Park MGM [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 16
Accumulated Other Adjustment Including Portion Attributable To Noncontrolling Interest | Northfield OpCo [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | (2)
AOCI Including Portion Attributable to Noncontrolling Interest |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | $ (8,556) | (8,556)
Other comprehensive income (loss) before reclassifications |  |  | (22,032)
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense |  |  | (3,614)
Other |  |  | (95)
Other comprehensive income (loss), net of tax |  |  | (26,011)
Less: Other comprehensive (income) loss attributable to noncontrolling interest |  |  | 8,237
Ending Balance | $ (26,330) |  | (26,330)
AOCI Including Portion Attributable to Noncontrolling Interest | Empire City MGP [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 195
AOCI Including Portion Attributable to Noncontrolling Interest | MGM Growth Properties LLC [Member] | Class A Shareholders [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Share issuance |  |  | (669)
AOCI Including Portion Attributable to Noncontrolling Interest | Park MGM [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | 16
AOCI Including Portion Attributable to Noncontrolling Interest | Northfield OpCo [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Acquisition transaction |  |  | $ (2)

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