DEBT - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Feb. 12, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Weighted-average interest rate (in percent)		4.60%
Debt instrument, increase (decrease)		$ 69,000,000
Debt payments		452,000,000
Prepayments of debt		67,000,000
Subsequent Event
Debt Instrument [Line Items]
Prepayment notice	$ 102,000,000
Other Debt Obligations
Debt Instrument [Line Items]
Debt instrument, face amount		885,000,000
Other Debt Obligations | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount		816,000,000
Alaskan And Hawaiian Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity		850,000,000
Outstanding borrowing		0
Alaskan Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity		106,000,000
Fixed Rate-Notes Payable, Due Through 2038 | Subsequent Event
Debt Instrument [Line Items]
Total debt, gross	$ 111,000,000
Interest rate swap agreements | Cash Flow Hedging | Derivative Instruments Designated as Hedges
Debt Instrument [Line Items]
Notional amount		$ 651,000,000