v3.24.0.1
Special Items (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Unusual or Infrequent Items, or Both [Abstract]        
Union contract costs $ 8,000,000 $ 105,000,000 $ 33,000,000 $ 8,000,000
Spirit costs   92,000,000 28,000,000 0
Embraer E190 fleet transition   0 52,000,000 0
Federal payroll support grant recognition   0 0 (830,000,000)
CARES Act employee retention credit   0 0 (11,000,000)
Total   $ 197,000,000 $ 113,000,000 $ (833,000,000)