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Commitments and Contingencies - Summary of Commitments Related to the Acquisition of Aircraft (Details)
$ in Billions
Dec. 31, 2021
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2022 $ 5.7
2023 6.9
2024 5.0
2025 4.3
2026 3.3
After 2026 8.9
Total $ 34.1