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COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Details) | 12 Months Ended | 20 Months Ended |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) aircraft | Dec. 31, 2020 USD ($) | Feb. 08, 2022 aircraft
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Payments for Construction in Process |  | $ 71,000,000 |
LAX Construction, Amount Reimbursed |  | $ 8,700,000 |
LAX Redevelopment Project, Total Expected Outlay | $ 230,000,000 |  |
Loss Contingency Accrual | 22,000,000 |  |
Minimum [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 0 |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 0 |  |
Maximum [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 22,000,000 |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 22,000,000 |  |
Virgin America Flight Attendants [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Loss Contingency, Damages Sought, Value | 78,000,000 |  |
Loss Contingency, Damages Sought, Value | 78,000,000 |  |
Aircraft Commitments [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
2022 | 1,339,000,000 |  |
2023 | 1,686,000,000 |  |
2024 | 389,000,000 |  |
2025 | 79,000,000 |  |
2026 | 13,000,000 |  |
Thereafter | 0 |  |
Total | 3,506,000,000 |  |
Capacity Purchase Agreements[Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
2022 | 173,000,000 |  |
2023 | 178,000,000 |  |
2024 | 183,000,000 |  |
2025 | 188,000,000 |  |
2026 | 189,000,000 |  |
Thereafter | 688,000,000 |  |
Total | $ 1,599,000,000 |  |
B737 |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Commited to purchase (in aircraft) | aircraft | 74 |  |
Option to purchase additional (in aircraft) | aircraft | 52 |  |
E175 [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Commited to purchase (in aircraft) | aircraft | 7 |  |
Option to purchase additional (in aircraft) | aircraft | 15 |  |
E175 [Member] | Subsequent Event |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Commited to purchase (in aircraft) | aircraft |  |  | 5
Property Subject to Operating Lease [Member] | B737 |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Operating leases, number of leased assets (in aircraft) | aircraft | 10 |  |
Property Subject to Operating Lease [Member] | B737 MAX [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Operating leases, number of leased assets (in aircraft) | aircraft | 5 |  |
Property Subject to Operating Lease [Member] | Q400 |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Operating leases, number of leased assets (in aircraft) | aircraft | 7 |  |
Property Subject to Operating Lease [Member] | Airbus |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Operating leases, number of leased assets (in aircraft) | aircraft | 61 |  |
Property Subject to Operating Lease [Member] | E175 [Member] |  |  |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |  |  |
Operating leases, number of leased assets (in aircraft) | aircraft | 32 |  |

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