Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Income Attributable to MGM Resorts International by Component (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Balances, January 1, 2017	$ 9,969,312
Other comprehensive loss before reclassifications	(51,322)
Amounts reclassified from accumulated other comprehensive income	7,368
Other comprehensive income (loss), net of tax	(43,845)
Less: Other comprehensive loss attributable to noncontrolling interest	18,952
Balances, September 30, 2017	10,324,740
MGM Growth Properties LLC [Member] | Class A shares [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
MGP Class A Share issuance adjustment	109
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balances, January 1, 2017	12,545
Other comprehensive loss before reclassifications	(41,313)
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive income (loss), net of tax	(41,313)
Less: Other comprehensive loss attributable to noncontrolling interest	18,308
Balances, September 30, 2017	(10,460)
Currency Translation Adjustments [Member] | MGM Growth Properties LLC [Member] | Class A shares [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
MGP Class A Share issuance adjustment	0
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balances, January 1, 2017	1,434
Other comprehensive loss before reclassifications	(10,009)
Amounts reclassified from accumulated other comprehensive income	7,368
Other comprehensive income (loss), net of tax	(2,641)
Less: Other comprehensive loss attributable to noncontrolling interest	644
Balances, September 30, 2017	(563)
Cash Flow Hedges [Member] | MGM Growth Properties LLC [Member] | Class A shares [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
MGP Class A Share issuance adjustment	0
Other [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balances, January 1, 2017	1,074
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive income (loss), net of tax	109
Less: Other comprehensive loss attributable to noncontrolling interest	0
Balances, September 30, 2017	1,183
Other [Member] | MGM Growth Properties LLC [Member] | Class A shares [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
MGP Class A Share issuance adjustment	109
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balances, January 1, 2017	15,053
Balances, September 30, 2017	$ (9,840)