v3.26.3
LONG-TERM DEBT - Schedule of Long-term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
May 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]      
Long-term debt, gross $ 5,701,162   $ 6,260,327
Less: Unamortized discounts and debt issuance costs, net (32,176)   (30,186)
Long-term debt $ 5,668,986   6,230,141
5.875% MGM China senior notes, due 2026 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 5.875% 5.875%  
Long-term debt, gross $ 0   750,000
4.625% senior notes, due 2026 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 4.625%    
Long-term debt, gross $ 0   400,000
5.5% senior notes, due 2027 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 5.50%    
Long-term debt, gross $ 675,000   675,000
4.75% MGM China senior notes, due 2027 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 4.75%    
Long-term debt, gross $ 750,000   750,000
4.75% senior notes, due 2028 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 4.75%    
Long-term debt, gross $ 750,000   750,000
6.125% senior notes, due 2029 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 6.125%    
Long-term debt, gross $ 850,000   850,000
7.125% MGM China senior notes, due 2031 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 7.125%    
Long-term debt, gross $ 500,000   500,000
6.5% senior notes, due 2032 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 6.50%    
Long-term debt, gross $ 750,000   750,000
6.25% MGM China senior notes, due 2033 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 6.25% 6.25%  
Long-term debt, gross $ 750,000   0
7% debentures, due 2036 | Debentures      
Debt Instrument [Line Items]      
Long-term debt, interest rate (in percent) 7.00%    
Long-term debt, gross $ 552   552
Revolving Credit Facility      
Debt Instrument [Line Items]      
Long-term debt, gross 1,350,000    
Revolving Credit Facility | Senior secured yen credit facility | Line of Credit      
Debt Instrument [Line Items]      
Long-term debt, gross 344,239   346,528
Revolving Credit Facility | MGM China revolving credit facility | Line of Credit      
Debt Instrument [Line Items]      
Long-term debt, gross $ 331,371   $ 488,247