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) |