Operating Leases - Early Return Agreement And Second Early Return Agreement (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Lessee, Lease, Description [Line Items] | |||
| Early Return Agreements charges | $ 180 | $ 0 | |
| Early Return Agreement | |||
| Lessee, Lease, Description [Line Items] | |||
| Write-off of non-recoverable capitalized prepaid maintenance | 73 | ||
| Accelerated depreciation | 63 | ||
| Early Return Agreements charges | (6) | ||
| Other charges | $ 2 | $ 81 | |
| Second Early Return Agreement | |||
| Lessee, Lease, Description [Line Items] | |||
| Write-off of non-recoverable capitalized prepaid maintenance | 26 | ||
| Accelerated depreciation | 31 | ||
| Early Return Agreements charges | (7) | ||
| Other charges | $ 84 | ||