Special Items (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Special items | ||||
| Voluntary opt-out costs | $ 24 | $ 1 | $ 24 | $ 16 |
| Spirit-related costs | 0 | 0 | 0 | 532 |
| Embraer E190 fleet transition costs | 0 | 0 | 0 | 15 |
| Total special items | $ 24 | $ 1 | $ 24 | $ 563 |