v3.25.4
INVESTMENTS - Narrative (Details) - USD ($)
1 Months Ended
Dec. 31, 2025
Oct. 31, 2025
Nov. 30, 2025
Dec. 31, 2024
Republic Airways        
Schedule of Equity Method Investments [Line Items]        
Ownership interest 14.00%     17.00%
WestJet        
Schedule of Equity Method Investments [Line Items]        
Ownership interest 13.00%     0.00%
Equity stake acquired (as a percent)   12.70%    
Payment to acquire equity stake   $ 276,000,000    
Grupo Aeroméxico        
Schedule of Equity Method Investments [Line Items]        
Ownership interest 19.00%   19.00% 20.00%
Carrying value of equity investment $ 377,000,000     $ 354,000,000
Unifi Aviation        
Schedule of Equity Method Investments [Line Items]        
Ownership interest 20.00%   49.00% 49.00%
Proceeds from sale of equity stake $ 80,000,000      
Carrying value of equity investment $ 51,000,000     $ 146,000,000
Virgin Atlantic        
Schedule of Equity Method Investments [Line Items]        
Ownership interest 49.00%      
Carrying value of equity investment $ 0      
Unrecognized equity method losses $ 620,000,000