Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

REVENUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
REVENUE - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Receivables - net	$ 569		$ 558
Passenger revenue
Disaggregation of Revenue [Line Items]
Revenue recognized	904	$ 584
Mileage Plan Revenue
Disaggregation of Revenue [Line Items]
Receivables - net	$ 111		$ 118