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Operating Leases - Aircraft (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) lease transaction aircraft | Jun. 30, 2023 USD ($) transaction aircraft lease | Jun. 30, 2024 USD ($) lease transaction engine aircraft | Jun. 30, 2023 USD ($) lease aircraft transaction
Lessee, Lease, Description [Line Items] |  |  |  |
Gains recognized on sale-leaseback transactions | $ |  |  | $ 148 | $ 57
Aircraft |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Number of leases | 148 |  | 148 |
Aircraft | Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Remaining lease terms | 8 months |  | 8 months |
Aircraft | Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Remaining lease terms | 12 years |  | 12 years |
Aircraft Engine |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Number of leases | 33 |  | 33 |
Number of engines dependent on usage-based metrics | engine |  |  | 10 |
Aircraft Engine | Aircraft Sale Leaseback |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Number of sale-leaseback transactions | transaction | 2 | 1 | 2 | 2
Aircraft Engine | Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Remaining lease terms | 1 month |  | 1 month |
Aircraft Engine | Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Remaining lease terms | 12 years |  | 12 years |
Aircraft and Aircraft Engines |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Gains recognized on sale-leaseback transactions | $ | $ 77 | $ 17 | $ 148 | $ 57
A320neo |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Number of leases in period | 0 | 2 | 0 | 5
A320neo | Aircraft | Aircraft Sale Leaseback |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Number of sale-leaseback transactions | aircraft | 6 | 1 | 12 | 4

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