v3.25.4
Fair Value Measurements and Derivative Instruments - Schedule of Fair Value and Line Item Caption of Derivative Instruments (Details) - Designated as Hedging Instrument - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Asset Derivatives    
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative financial instruments Derivative financial instruments
Asset Derivatives [1] $ 144 $ 71
Liability Derivatives    
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative financial instruments Derivative financial instruments
Liability Derivatives [1] $ 124 $ 139
Interest rate swaps | Derivative Financial Instruments    
Asset Derivatives    
Asset Derivatives [1] 1 0
Liability Derivatives    
Liability Derivatives [1] 0 0
Interest rate swaps | Other Assets    
Asset Derivatives    
Asset Derivatives [1] 29 58
Interest rate swaps | Other long-term Liabilities    
Liability Derivatives    
Liability Derivatives [1] 1 0
Foreign currency forward contracts | Derivative Financial Instruments    
Asset Derivatives    
Asset Derivatives [1] 114 0
Liability Derivatives    
Liability Derivatives [1] 0 71
Foreign currency forward contracts | Other Assets    
Asset Derivatives    
Asset Derivatives [1] 0 0
Foreign currency forward contracts | Other long-term Liabilities    
Liability Derivatives    
Liability Derivatives [1] 0 22
Fuel swaps | Derivative Financial Instruments    
Asset Derivatives    
Asset Derivatives [1] 0 10
Liability Derivatives    
Liability Derivatives [1] 67 19
Fuel swaps | Other Assets    
Asset Derivatives    
Asset Derivatives [1] 0 3
Fuel swaps | Other long-term Liabilities    
Liability Derivatives    
Liability Derivatives [1] $ 56 $ 27
[1] Subtopic 815-20 “Hedging-General” under ASC 815.