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Investment in Other Companies (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 aircraft | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) engine
Eve UAM, LLC ("Eve") | Strategic partnership | Electric vertical takeoff and landing ("eVTOL") aircraft | Forecast |  |  |  |
Non-binding letter of intent to purchase number of aircraft | aircraft | 100 |  |  |
Aero Engines, LLC. |  |  |  |
Payments to acquire interest in joint venture |  |  |  | $ 22.3
Investment ownership (as a percent) |  | 75.00% |  | 75.00%
Number of spare engines purchased | engine |  |  |  | 15
Number of spare engines sold to Aero Engines | engine |  |  |  | 15
Additional interest in Joint venture |  |  | $ 1.0 |
Long-term debt |  | $ 0.0 |  |
Investment balance in Aero Engines |  | 20.2 |  |
Aero Engines, LLC. | Other Nonoperating Income. |  |  |  |
Company's portion of loss generated by Aero Engines |  | $ 5.3 |  |

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