v3.26.3
DEBT - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended
Jun. 30, 2026
Apr. 30, 2026
Jan. 31, 2026
Sep. 30, 2026
Revolving credit facility        
Debt Instrument [Line Items]        
Undrawn credit facilities       $ 3,100
Secured debt | 2026 Term Loan        
Debt Instrument [Line Items]        
Debt instrument amount     $ 1,250  
Secured debt | 2027 Term Loan        
Debt Instrument [Line Items]        
Debt instrument amount       $ 1,250
Secured debt | SkyMiles Credit Facility        
Debt Instrument [Line Items]        
Margin on rate   1.25%    
Prepayment premium   1.00%    
Unsecured debt | Unsecured Payroll Support Program Loans        
Debt Instrument [Line Items]        
Repayment of PSP loans due 2031     $ 957  
Revolving credit facility | 2026 Corporate Revolving Credit Facility        
Debt Instrument [Line Items]        
Liquidity facility $ 2,650      
Revolving credit facility | Three-year tranche credit facility        
Debt Instrument [Line Items]        
Liquidity facility $ 1,325      
Debt instrument term 3 years      
Revolving credit facility | Five-year tranche credit facility        
Debt Instrument [Line Items]        
Liquidity facility $ 1,325      
Debt instrument term 5 years