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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 90,304	$ (936,487)	$ (245,634)	$ (261,968)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	5,811	289	(7,211)	28,625
Unrealized gain (loss) on cash flow hedges	2,090	(7,114)	17,388	(90,200)
Other comprehensive income (loss)	7,901	(6,825)	10,177	(61,575)
Comprehensive income (loss)	98,205	(943,312)	(235,457)	(323,543)
Less: Comprehensive loss attributable to noncontrolling interests	10,213	82,074	11,792	239,426
Comprehensive income (loss) attributable to MGM Resorts International	$ 108,418	$ (861,238)	$ (223,665)	$ (84,117)

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