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SEGMENT INFORMATION - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues
Total revenue	$ 3,873,296	$ 2,854,309
Other operating income (expense)
Preopening and start-up expenses	(139)	(434)
Property transactions, net	396,076	(54,738)
Depreciation and amortization	(203,501)	(288,638)
Triple-net operating lease and ground lease rent expense	(570,555)	(262,452)
Income from unconsolidated affiliates related to real estate ventures	2,695	41,646
Operating income	730,839	105,788
Non-operating income (expense)
Interest expense, net of amounts capitalized	(130,300)	(196,091)
Non-operating items from unconsolidated affiliates	(1,184)	(15,133)
Other, net	46,307	34,302
Non-operating income (expense)	(85,177)	(176,922)
Income (loss) before income taxes	645,662	(71,134)
Benefit (provision) for income taxes	(165,779)	36,341
Net income (loss)	479,883	(34,793)
Less: Net (income) loss attributable to noncontrolling interests	(13,076)	16,777
Net income (loss) attributable to MGM Resorts International	466,807	(18,016)
Reportable segments
Revenues
Total revenue	3,739,587	2,822,096
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	1,317,932	881,257
Reportable segments | Las Vegas Strip Resorts
Revenues
Total revenue	2,176,152	1,662,892
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	835,809	593,634
Reportable segments | Regional Operations
Revenues
Total revenue	945,843	890,829
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	313,175	313,279
Reportable segments | MGM China
Revenues
Total revenue	617,592	268,375
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	168,948	(25,656)
Corporate and other
Revenues
Total revenue	133,709	32,213
Other operating income (expense)
Corporate and other, net	(211,669)	(210,853)
Casino
Revenues
Total revenue	1,882,428	1,420,910
Casino | Reportable segments | Las Vegas Strip Resorts
Revenues
Total revenue	500,563	475,298
Casino | Reportable segments | Regional Operations
Revenues
Total revenue	716,977	703,679
Casino | Reportable segments | MGM China
Revenues
Total revenue	555,272	231,203
Rooms
Revenues
Total revenue	848,488	557,073
Rooms | Reportable segments | Las Vegas Strip Resorts
Revenues
Total revenue	751,691	485,288
Rooms | Reportable segments | Regional Operations
Revenues
Total revenue	67,304	56,114
Rooms | Reportable segments | MGM China
Revenues
Total revenue	29,493	15,671
Food and beverage
Revenues
Total revenue	722,131	492,854
Food and beverage | Reportable segments | Las Vegas Strip Resorts
Revenues
Total revenue	582,627	384,276
Food and beverage | Reportable segments | Regional Operations
Revenues
Total revenue	111,879	91,138
Food and beverage | Reportable segments | MGM China
Revenues
Total revenue	27,625	17,441
Entertainment, retail and other
Revenues
Total revenue	409,578	371,566
Entertainment, retail and other | Reportable segments | Las Vegas Strip Resorts
Revenues
Total revenue	341,271	318,030
Entertainment, retail and other | Reportable segments | MGM China
Revenues
Total revenue	5,202	4,060
Entertainment, retail and other, and reimbursed costs | Reportable segments | Regional Operations
Revenues
Total revenue	$ 49,683	$ 39,898

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