v3.26.1
Financial Derivative Instruments - Schedule of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Fuel derivative contracts | Income Statement Location [Axis]: us-gaap:FuelCosts        
Derivative [Line Items]        
Total $ 29 $ 36 $ (58) $ (73)