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DEBT - Summary of Debt (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |
Debt, gross | $ 21,519 | $ 25,292
Unamortized (discount)/premium and debt issuance cost, net and other | (138) | (208)
Total debt | 21,381 | 25,084
Less: current maturities | (2,055) | (1,502)
Total long-term debt | $ 19,326 | 23,582
Unsecured Payroll Support Program Loans | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2030 |
Maturity dates range, end | Dec. 31, 2031 |
Interest rate per annum (percent) | 1.00% |
Debt, gross | $ 3,496 | 3,496
Unsecured notes | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2029 |
Debt, gross | $ 2,997 | 4,354
Unsecured notes | Unsecured Debt | Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 2.90% |
Unsecured notes | Unsecured Debt | Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 7.38% |
SkyMiles Notes | Secured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2028 |
Interest rate per annum (percent) | 4.50% |
Debt, gross | $ 5,144 | 6,000
SkyMiles Notes | Secured Debt | Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 4.50% |
SkyMiles Notes | Secured Debt | Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 4.75% |
SkyMiles Term Loan | Secured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2027 |
Interest rate per annum (percent) | 7.99% |
Debt, gross | $ 2,820 | 2,820
Financings secured by aircraft - Certificates | Secured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2028 |
Debt, gross | $ 1,802 | 1,932
Financings secured by aircraft - Certificates | Secured Debt | Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 2.00% |
Financings secured by aircraft - Certificates | Secured Debt | Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 8.00% |
Financings secured by aircraft - Notes | Secured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2033 |
Debt, gross | $ 813 | 1,139
Financings secured by aircraft - Notes | Secured Debt | Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 2.08% |
Financings secured by aircraft - Notes | Secured Debt | Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 6.85% |
NYTDC Special Facilities Revenue Bonds, Series 2020 | Bonds |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2045 |
Debt, gross | $ 2,838 | 2,894
NYTDC Special Facilities Revenue Bonds, Series 2020 | Bonds | Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 4.00% |
NYTDC Special Facilities Revenue Bonds, Series 2020 | Bonds | Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 5.00% |
2020 Senior Secured Notes | Secured Debt |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 7.00% |
Debt, gross | $ 1,542 | 2,589
2018 Revolving Credit Facility | Secured Debt |  |
Debt Instrument [Line Items] |  |
Maturity date | Dec. 31, 2025 |
2018 Revolving Credit Facility | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2024 |
Maturity dates range, end | Dec. 31, 2025 |
Debt, gross | $ 0 | 0
Other financings | Secured and unsecured Debt |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2030 |
Debt, gross | $ 67 | 68
Other financings | Secured and unsecured Debt | Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 2.51% |
Other financings | Secured and unsecured Debt | Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate per annum (percent) | 5.00% |
Other revolving credit facilities | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Maturity dates range, start | Dec. 31, 2023 |
Maturity dates range, end | Dec. 31, 2025 |
Debt, gross | $ 0 | $ 0

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