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v3.25.2

REVENUE - Loyalty Program Liability Rollforward (Details) - Mileage Plan Revenue - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Change in Contract with Customer, Liability [Roll Forward] |  |
Beginning balance | $ 3,256 | $ 2,603
Increase in liability for mileage credits issued | 990 | 613
Ending balance | 3,472 | 2,641
Passenger Services |  |
Change in Contract with Customer, Liability [Roll Forward] |  |
Revenue recognized | (655) | (508)
Mileage plan other revenue |  |
Change in Contract with Customer, Liability [Roll Forward] |  |
Revenue recognized | $ (119) | $ (67)

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