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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 5,024,905		$ 5,029,312
Total indefinite-lived intangible assets	1,141,507		1,139,491
Finite-lived intangible assets, net	614,644		411,761
Other intangible assets, net	1,756,151		1,551,252
Gaming Subconcession | M G M Grand Paradise
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	0		4,519,486
Less: Accumulated amortization	0		(4,519,486)
Finite-lived intangible assets, net	0		0
Customer lists
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	284,937		283,232
Less: Accumulated amortization	(71,914)		(60,055)
Finite-lived intangible assets, net	213,023		223,177
Gaming rights
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	332,032		106,600
Less: Accumulated amortization	(40,723)		(33,316)
Finite-lived intangible assets, net	291,309		73,284
Technology and other
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	130,530		129,061
Less: Accumulated amortization	(20,218)		(13,761)
Finite-lived intangible assets, net	110,312		115,300
Gaming Concession | M G M Grand Paradise
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross		$ 226,000
Trademarks
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	756,378		754,431
Gaming rights and other
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	$ 385,129		$ 385,060

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