v3.26.1
DEBT - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended
Jun. 30, 2026
Apr. 30, 2026
Jan. 31, 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 | 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