v3.24.0.1
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated other comprehensive income (loss), net of taxes      
Beginning balance $ 3,563 $ 3,849 $ 3,951
Reclassifications into earnings, net of tax (6) 4 0
Change in fair value 2 (4) 0
Ending balance 3,337 3,563 3,849
Reclassifications into earnings, tax 2 (3) 0
Change in fair value, tax 0 2 0
Accumulated Other Comprehensive Income (Loss)      
Accumulated other comprehensive income (loss), net of taxes      
Beginning balance 0 0 0
Ending balance (4) 0 0
Aircraft Fuel Derivatives      
Accumulated other comprehensive income (loss), net of taxes      
Beginning balance 1 0 0
Reclassifications into earnings, net of tax (5) 4 0
Change in fair value 1 (3) 0
Ending balance (3) 1 0
Available-for-sale securities      
Accumulated other comprehensive income (loss), net of taxes      
Beginning balance (1) 0 0
Reclassifications into earnings, net of tax (1) 0 0
Change in fair value 1 (1) 0
Ending balance $ (1) $ (1) $ 0