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INVESTMENTS (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Investments [Line Items] |  |
Equity investments | $ 3,022 | $ 3,457
Grupo Aeromexico |  |
Investments [Line Items] |  |
Ownership interest (percent) | 20.00% | 20.00%
Carrying value | $ 438 | $ 421
Unifi Aviation |  |
Investments [Line Items] |  |
Ownership interest (percent) | 49.00% | 49.00%
Carrying value | $ 139 | $ 162
Air France-KLM |  |
Investments [Line Items] |  |
Ownership interest (percent) | 3.00% | 3.00%
Carrying value | $ 65 | $ 110
China Eastern |  |
Investments [Line Items] |  |
Ownership interest (percent) | 2.00% | 2.00%
Carrying value | $ 117 | $ 134
Hanjin-KAL |  |
Investments [Line Items] |  |
Ownership interest (percent) | 15.00% | 15.00%
Carrying value | $ 467 | $ 561
Hanjin-KAL | Common and Preferred Shares |  |
Investments [Line Items] |  |
Ownership interest (percent) | 14.80% |
Hanjin-KAL | Common Stock |  |
Investments [Line Items] |  |
Ownership interest (percent) | 14.90% |
LATAM |  |
Investments [Line Items] |  |
Ownership interest (percent) | 10.00% | 10.00%
Carrying value | $ 829 | $ 658
Wheels Up |  |
Investments [Line Items] |  |
Ownership interest (percent) | 38.00% | 38.00%
Carrying value | $ 498 | $ 903
Voting rights, shares held threshold | 29.90% |
Other investments |  |
Investments [Line Items] |  |
Carrying value | $ 469 | $ 508

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