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REVENUE - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |
Receivables - net | $ 558 | $ 383 |
Hawaiian Holdings, Inc. |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Air traffic liability | 513 |  | $ 513
Passenger Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue recognized | 766 | 823 |
Mileage Plan Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Receivables - net | $ 118 | $ 102 |

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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