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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Thousands, MOP$ in Millions	1 Months Ended	9 Months Ended
	Jan. 31, 2023 MOP (MOP$)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 MOP (MOP$)	Sep. 30, 2023 JPY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 MOP (MOP$)
Loss Contingencies [Line Items]
Commitment amount		$ 8,500,000		¥ 1,270,000,000,000
Long-term debt, gross		6,536,906			$ 8,761,189
Senior Credit Facility
Loss Contingencies [Line Items]
Credit facility outstanding		29,000
Revolving Credit Facility
Loss Contingencies [Line Items]
Long-term debt, gross		1,350,000
Performance Guarantee
Loss Contingencies [Line Items]
Obligation amount		$ 85,000		¥ 12,650,000,000
Guarantor obligations (as s percent)		50.00%
Blackstone real estate income trust
Loss Contingencies [Line Items]
Obligation amount		$ 3,010,000
Mandalay Bay and MGM Grand Las Vegas
Loss Contingencies [Line Items]
Obligation amount		3,000,000
MGM Grand Paradise SA | January 2023 Concessions
Loss Contingencies [Line Items]
Obligation amount	MOP$ 1,000	124,000			124,000	MOP$ 1,000
Guarantee expiration, days after the end of the concession term	180 days
Released pledged cash		300,000
MGM Grand Paradise SA | June 2022 Sub Concession Extension Contract
Loss Contingencies [Line Items]
Obligation amount		$ 87,000	MOP$ 700		$ 124,000

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