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v3.25.1

REVENUE - Loyalty Program Liability Rollforward (Details) - Mileage Plan Revenue - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Change in Contract with Customer, Liability [Roll Forward] |  |
Beginning balance | $ 3,256 | $ 2,603
Increase in liability for mileage credits issued | 414 | 292
Ending balance | 3,314 | 2,633
Passenger Services |  |
Change in Contract with Customer, Liability [Roll Forward] |  |
Revenue recognized | (307) | (234)
Mileage plan other revenue |  |
Change in Contract with Customer, Liability [Roll Forward] |  |
Revenue recognized | $ (49) | $ (28)

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