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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands, ¥ in Millions, MOP$ in Millions	1 Months Ended		3 Months Ended				9 Months Ended
	Feb. 28, 2025 USD ($)	Jan. 31, 2023 MOP (MOP$)	Sep. 30, 2025 USD ($)	Sep. 30, 2025 JPY (¥)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 JPY (¥)	Sep. 30, 2025 USD ($)	Sep. 30, 2025 JPY (¥)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 JPY (¥)	Sep. 30, 2025 MOP (MOP$)	Sep. 30, 2025 JPY (¥)	Dec. 31, 2024 USD ($)
Loss Contingencies [Line Items]
Funded amount							$ 208,343		$ 182,078
Long-term debt, gross			$ 6,196,532				6,196,532						$ 6,403,119
Senior Credit Facility
Loss Contingencies [Line Items]
Credit facility outstanding			25,000				25,000
Revolving Credit Facility
Loss Contingencies [Line Items]
Long-term debt, gross			$ 1,350,000				$ 1,350,000
MGM Osaka | Japan
Loss Contingencies [Line Items]
Guarantor obligations (as a percent)			50.00%				50.00%				50.00%	50.00%
Purchase commitment, amount | ¥												¥ 428,000
Commitment amount			$ 2,400,000				$ 2,400,000					361,000
Funded amount			123,000	¥ 18,400	$ 138,000	¥ 22,200	208,000	¥ 30,700	$ 157,000	¥ 25,200
MGM Osaka | Japan | Asset Pledged as Collateral
Loss Contingencies [Line Items]
Equity method investment			432,000				432,000
Performance Guarantee
Loss Contingencies [Line Items]
Obligation amount			86,000				86,000					¥ 12,650
Blackstone Real Estate Income Trust
Loss Contingencies [Line Items]
Obligation amount			3,010,000				3,010,000
MGM Grand Paradise SA | January 2023 Concessions
Loss Contingencies [Line Items]
Obligation amount		MOP$ 1,000	125,000				125,000
Guarantee expiration, days after the end of the concession term		180 days
MGM Grand Paradise SA | Gaming Concessions
Loss Contingencies [Line Items]
Obligation amount			$ 87,000				$ 87,000				MOP$ 700
Insurance Carriers
Loss Contingencies [Line Items]
Payments for legal settlements	$ 45,000

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