v3.25.2
DEBT - Narrative (Details)
$ in Millions
Jun. 30, 2025
USD ($)
Debt Instrument [Line Items]  
Unamortized debt discount $ 155
Secured Debt | MileagePlus Notes  
Debt Instrument [Line Items]  
Outstanding principal balance 1,520
Secured Debt | Revolving Credit Facility  
Debt Instrument [Line Items]  
Undrawn and available amount under revolving credit facility $ 3,000