Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (335,938)	$ 674,519
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(13,022)	28,336
Unrealized gain (loss) on cash flow hedges	15,298	(83,086)
Other comprehensive income (loss)	2,276	(54,750)
Comprehensive income (loss)	(333,662)	619,769
Less: Comprehensive loss attributable to noncontrolling interests	1,579	157,352
Comprehensive income (loss) attributable to MGM Resorts International	$ (332,083)	$ 777,121