Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues
Revenues	$ 1,647,747	$ 2,252,817
Expenses
General and administrative	546,407	574,306
Corporate expense	78,037	143,808
Preopening and start-up expenses	5	122
Property transactions, net	26,071	54,975
Gain on REIT transactions, net	0	(1,491,945)
Depreciation and amortization	290,551	318,290
Total expenses	1,868,858	1,037,720
Income (loss) from unconsolidated affiliates	(25,579)	35,748
Operating income (loss)	(246,690)	1,250,845
Non-operating income (expense)
Interest expense, net of amounts capitalized	(195,295)	(157,137)
Non-operating items from unconsolidated affiliates	(20,836)	(32,621)
Other, net	32,185	(124,264)
Total non-operating income (expense)	(183,946)	(314,022)
Income (loss) before income taxes	(430,636)	936,823
Benefit (provision) for income taxes	94,698	(262,304)
Net income (loss)	(335,938)	674,519
Less: Net loss attributable to noncontrolling interests	4,109	132,350
Net income (loss) attributable to MGM Resorts International	$ (331,829)	$ 806,869
Earnings (loss) per share
Basic	$ (0.69)	$ 1.64
Diluted	$ (0.69)	$ 1.64
Weighted average common shares outstanding
Basic	494,864	495,415
Diluted	494,864	496,984
Casino [Member]
Revenues
Revenues	$ 1,098,633	$ 1,054,026
Expenses
Expenses	551,905	628,670
Rooms [Member]
Revenues
Revenues	198,419	433,951
Expenses
Expenses	104,213	172,609
Food and Beverage [Member]
Revenues
Revenues	157,412	396,709
Expenses
Expenses	135,227	339,636
Entertainment, Retail and Other [Member]
Revenues
Revenues	135,222	269,945
Expenses
Expenses	78,381	199,063
Reimbursed Costs [Member]
Revenues
Revenues	58,061	98,186
Expenses
Expenses	$ 58,061	$ 98,186