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INVESTMENTS - Equity Investments Ownership Interest and Carrying Value (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Equity Investments |  |
Equity investments | $ 3,457 | $ 2,128
Air France-KLM |  |
Equity Investments |  |
Ownership Interest | 3.00% | 3.00%
Carrying Value | $ 110 | $ 97
China Eastern |  |
Equity Investments |  |
Ownership Interest | 2.00% | 2.00%
Carrying Value | $ 134 | $ 189
CLEAR |  |
Equity Investments |  |
Ownership Interest | 6.00% | 5.00%
Carrying Value | $ 171 | $ 227
Hanjin-KAL |  |
Equity Investments |  |
Ownership Interest | 15.00% | 15.00%
Carrying Value | $ 561 | $ 296
Hanjin-KAL | Common and Preferred Shares |  |
Equity Investments |  |
Ownership Interest | 14.80% |
Hanjin-KAL | Common Stock |  |
Equity Investments |  |
Ownership Interest | 14.90% |
LATAM |  |
Equity Investments |  |
Ownership Interest | 10.00% | 10.00%
Carrying Value | $ 658 | $ 403
Wheels Up |  |
Equity Investments |  |
Ownership Interest | 38.00% | 21.00%
Carrying Value | $ 903 | $ 54
Other investments |  |
Equity Investments |  |
Carrying Value | $ 337 | $ 285
Grupo Aeroméxico |  |
Equity Investments |  |
Ownership Interest | 20.00% | 20.00%
Carrying Value | $ 421 | $ 412
Unifi Aviation |  |
Equity Investments |  |
Ownership Interest | 49.00% | 49.00%
Carrying Value | $ 162 | $ 165

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