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COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) aircraft | Jan. 31, 2023
Subsequent event |  |
Future Purchase Commitments |  |
Employee Pay Rate Increase |  | 18.00%
Future aircraft purchase commitments |  |
Future Purchase Commitments |  |
Future aircraft purchase commitments | $ | $ 18,960 |
B-737-10 |  |
Future Purchase Commitments |  |
Number of aircrafts ordered | 100 |
Number of aircraft options | 30 |
B-737-900ER |  |
Future Purchase Commitments |  |
Number of aircraft agreed to be acquired | 4 |
A330-900 |  |
Future Purchase Commitments |  |
Number of aircraft agreed to be acquired | 1 |
A220-300 |  |
Future Purchase Commitments |  |
Number of aircraft purchase rights exercised | 24 |

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