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GOVERNMENT GRANTS AND RESTRUCTURING - Restructuring Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) employee
Restructuring Cost and Reserve [Line Items] |  |  |
Grant payments received through payroll support program | $ 4,500 | $ 3,900 |
Asset impairment charges |  |  | $ 4,400
Restructuring charges | (124) | (19) | $ 8,219
Number of employees participating | employee |  |  | 18,000
Retired aircraft |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Cumulative net book value of retired aircraft | 220 | 340 |
Voluntary early retirement and separation programs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | 3,400 |
Voluntary early retirement and separation programs | Special termination benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Special termination benefits |  | 1,300 |
Voluntary early retirement and separation programs | Separation payments and healthcare benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Cash payments disbursed to participants | 440 | 575 | $ 720
Voluntary early retirement and separation programs | Unpaid vacation and other benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Cash payments disbursed to participants |  | $ 250 |
Reserve against outstanding receivables from LATAM, Grupo Aeromexico, GOL, Virgin Atlantic and others |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Reserves against outstanding receivables | $ 7 |  | $ 100

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