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Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Income Attributable to MGM Resorts International by Component (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance $ 10,469,791
Ending Balance 11,217,865
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 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)
Other comprehensive income (loss) before reclassifications (12,405)
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense 0
Other 0
Other comprehensive income (loss), net of tax (12,405)
Less: Other comprehensive (income) loss attributable to noncontrolling interest 5,499
Ending Balance (25,778)
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 Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest  
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance 9,144
Other comprehensive income (loss) before reclassifications (11,476)
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense (1,847)
Other 0
Other comprehensive income (loss), net of tax (13,323)
Less: Other comprehensive (income) loss attributable to noncontrolling interest 4,717
Ending Balance 538
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 Other Adjustment Including Portion Attributable To Noncontrolling Interest  
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance 1,172
Other comprehensive income (loss) before reclassifications 0
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense 0
Other 23
Other comprehensive income (loss), net of tax (540)
Less: Other comprehensive (income) loss attributable to noncontrolling interest 0
Ending Balance 632
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 (774)
Accumulated Other Adjustment 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  
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance (8,556)
Other comprehensive income (loss) before reclassifications (23,881)
Amounts reclassified from accumulated other comprehensive income (loss) to interest expense (1,847)
Other 23
Other comprehensive income (loss), net of tax (26,268)
Less: Other comprehensive (income) loss attributable to noncontrolling interest 10,216
Ending Balance (24,608)
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 (774)
AOCI Including Portion Attributable to Noncontrolling Interest | Park MGM [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Acquisition transaction $ 16