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WORLDWIDE PANDEMIC - Narrative (Details) $ in Millions |  |  |  | 12 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) employee | Dec. 31, 2021 USD ($) | Jun. 01, 2020 | Dec. 31, 2022 USD ($) employee | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2021 employee
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |
Extended emergency time off accrual for employees who accepted through 2020 |  |  |  | $ 109 |  |  |
COVID - 19 |  |  |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |
Voluntary separation program 2020 participants | employee | 4,200 |  |  | 4,200 |  |  |
Number of employees who participated in extended emergency time off during 2020 | employee |  |  |  |  |  |  | 12,000
Extended emergency time off accrual for employees who accepted through 2020 | $ 219 | $ 328 |  |  | $ 446 | $ 1,400 |
Extended emergency time off reversal for employees who accepted through March 31, 2021 |  |  |  | $ 140 |  |  |
Proceeds from PSP2 payroll support program |  |  |  |  | $ 2,700 |  |
COVID - 19 | Minimum |  |  |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |
Extended emergency time off, period |  |  | 6 months |  |  |  |
COVID - 19 | Maximum |  |  |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |
Extended emergency time off, period |  |  | 18 months |  |  |  |
COVID - 19 | Maximum | Pilots |  |  |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |
Extended emergency time off, period |  |  | 5 years |  |  |  |

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