REVENUE - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Receivables - net	$ 565	$ 558
Hawaiian Holdings, Inc.
Disaggregation of Revenue [Line Items]
Air traffic liability	513
Passenger revenue
Disaggregation of Revenue [Line Items]
Revenue recognized	1,200	766
Loyalty Plan Revenue
Disaggregation of Revenue [Line Items]
Receivables - net	$ 154	$ 176