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Commitments and Contingencies (Details) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Apr. 30, 2021 USD ($) airport | Mar. 31, 2022 USD ($) aircraft | Feb. 28, 2022 aircraft
Unrecorded Unconditional Purchase Obligation [Line Items] |  |  |
Remainder of fiscal year |  | $ 700 |
2023 |  | 1,600 |
2024 |  | 2,000 |
2025 |  | 1,700 |
2026 |  | 1,400 |
Thereafter |  | 1,000 |
Restricted assets pledged under letter of credit |  | 32 |
Restricted assets pledged related to workers compensation insurance policies and other business partner agreements |  | $ 26 |
Employment agreement term |  | 5 years |
Number of northeast airports | airport | 4 |  |
One-time bonus payment | $ 30 |  |
Base pay increase | 3.00% |  |
Automatic renewal term, employment agreement, term |  | 5 years |
Renewal notice period, employment agreement, period |  | 90 days |
A220-300 |  |  |
Unrecorded Unconditional Purchase Obligation [Line Items] |  |  |
Option exercise, number of aircraft | aircraft |  |  | 30
Option exercise, number of aircraft, remaining available | aircraft |  |  | 20
Unrecorded unconditional purchase obligations disclosure | aircraft |  | 92 |
Aircraft expected for delivery | aircraft |  | 9 |
A-321 Neo |  |  |
Unrecorded Unconditional Purchase Obligation [Line Items] |  |  |
Unrecorded unconditional purchase obligations disclosure | aircraft |  | 64 |

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