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Commitments and Contingencies - Aircraft Commitments by Year (Details) - Future aircraft purchase commitments
$ in Millions
Jun. 30, 2022
USD ($)
Future aircraft purchase commitments:  
Six months ending December 31, 2022 $ 2,320
2023 3,170
2024 3,480
2025 2,890
2026 2,240
Thereafter 960
Total $ 15,060