v3.26.1
Fair Value Measurements and Derivative Instruments - Schedule of Effect of Derivative Instruments Not Designated as Cash Flow Hedging Instruments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Effect of derivative instruments involved in hedging on the consolidated financial statements        
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives $ (79) $ 177 $ 160 $ 310
Interest rate swaps        
Effect of derivative instruments involved in hedging on the consolidated financial statements        
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives 5 (3) 11 (8)
Foreign currency forward contracts        
Effect of derivative instruments involved in hedging on the consolidated financial statements        
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives (24) 238 (149) 355
Fuel swaps        
Effect of derivative instruments involved in hedging on the consolidated financial statements        
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives $ (60) $ (58) $ 298 $ (37)