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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Ownership interest (in percent) 100.00%    
Fair value of investment $ 420   $ 388
Net gain (loss) on equity investments 32 $ (24)  
Loss reserve for accounts receivable 134   135
Accrual for property and equipment within accounts payable 84   109
Food and Beverage Revenue      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Lease revenue 18 20  
Entertainment Retail and Other Revenue      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Lease revenue 28 28  
MGM Grand Paradise SA | June 2022 Sub Concession Extension Contract      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Obligation amount 87   87
Foreign Exchange Forward      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Derivative asset 2    
Derivative liability 60   96
Derivative liability current     57
Derivative liability noncurrent     $ 39
Net gain (loss) on derivative $ 40 $ (38)  
Bellagio BREIT Venture      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Ownership interest by noncontrolling owner (in percent) 5.00%