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SEGMENT INFORMATION - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net revenue
Revenues	$ 2,854,309	$ 1,647,747
Other operating income (expense)
Preopening and start-up expenses	(434)	(5)
Property transactions, net	(54,738)	(26,071)
Depreciation and amortization	(288,638)	(290,551)
Triple-net operating lease and ground lease rent expense	(262,452)	(189,620)
Income from unconsolidated affiliates related to real estate ventures	41,646	41,672
Operating income (loss)	105,788	(246,690)
Non-operating income (expense)
Interest expense, net of amounts capitalized	(196,091)	(195,295)
Non-operating items from unconsolidated affiliates	(15,133)	(20,836)
Other, net	34,302	32,185
Non-operating income (expense)	(176,922)	(183,946)
Loss before income taxes	(71,134)	(430,636)
Benefit for income taxes	36,341	94,698
Net loss	(34,793)	(335,938)
Less: Net loss attributable to noncontrolling interests	16,777	4,109
Net loss attributable to MGM Resorts International	(18,016)	(331,829)
Casino
Net revenue
Revenues	1,420,910	1,098,633
Rooms
Net revenue
Revenues	557,073	198,419
Food and beverage
Net revenue
Revenues	492,854	157,412
Entertainment, retail and other
Net revenue
Revenues	371,566	135,222
Reportable segments
Net revenue
Revenues	2,822,096	1,552,669
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	881,257	354,876
Reportable segments | Las Vegas Strip Resorts
Net revenue
Revenues	1,662,892	544,964
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	593,634	108,119
Reportable segments | Regional Operations
Net revenue
Revenues	890,829	711,351
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	313,279	241,982
Reportable segments | MGM China
Net revenue
Revenues	268,375	296,354
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	(25,656)	4,775
Reportable segments | Casino | Las Vegas Strip Resorts
Net revenue
Revenues	475,298	232,094
Reportable segments | Casino | Regional Operations
Net revenue
Revenues	703,679	596,655
Reportable segments | Casino | MGM China
Net revenue
Revenues	231,203	261,604
Reportable segments | Rooms | Las Vegas Strip Resorts
Net revenue
Revenues	485,288	144,329
Reportable segments | Rooms | Regional Operations
Net revenue
Revenues	56,114	40,579
Reportable segments | Rooms | MGM China
Net revenue
Revenues	15,671	13,512
Reportable segments | Food and beverage | Las Vegas Strip Resorts
Net revenue
Revenues	384,276	90,419
Reportable segments | Food and beverage | Regional Operations
Net revenue
Revenues	91,138	50,364
Reportable segments | Food and beverage | MGM China
Net revenue
Revenues	17,441	16,629
Reportable segments | Entertainment, retail and other | Las Vegas Strip Resorts
Net revenue
Revenues	318,030	78,122
Reportable segments | Entertainment, retail and other | Regional Operations
Net revenue
Revenues	39,898	23,753
Reportable segments | Entertainment, retail and other | MGM China
Net revenue
Revenues	4,060	4,609
Corporate and other
Net revenue
Revenues	32,213	95,078
Other operating income (expense)
Corporate and other, net	$ (210,853)	$ (136,991)

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