v3.26.3
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
Sep. 30, 2026
Dec. 31, 2025
Asset Derivatives    
Derivative asset, statement of financial position Derivative financial instruments Derivative financial instruments
Derivative financial instruments [1] $ 289 $ 144
Liability Derivatives    
Derivative liability, statement of financial position Derivative financial instruments Derivative financial instruments
Derivative financial instruments [1] $ 178 $ 124
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeLiabilitiesCurrent    
Asset Derivatives    
Derivative financial instruments [1] 0 1
Liability Derivatives    
Derivative financial instruments [1] 0 0
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Asset Derivatives    
Derivative financial instruments [1] 38 29
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Liability Derivatives    
Derivative financial instruments [1] 0 1
Foreign currency forward contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeLiabilitiesCurrent    
Asset Derivatives    
Derivative financial instruments [1] 0 114
Liability Derivatives    
Derivative financial instruments [1] 107 0
Foreign currency forward contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Asset Derivatives    
Derivative financial instruments [1] 0 0
Foreign currency forward contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Liability Derivatives    
Derivative financial instruments [1] 71 0
Fuel swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeLiabilitiesCurrent    
Asset Derivatives    
Derivative financial instruments [1] 160 0
Liability Derivatives    
Derivative financial instruments [1] 0 67
Fuel swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Asset Derivatives    
Derivative financial instruments [1] 91 0
Fuel swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Liability Derivatives    
Derivative financial instruments [1] $ 0 $ 56
[1] Subtopic 815-20 “Hedging-General” under ASC 815.