INVESTMENTS - Narrative (Details)	3 Months Ended
Dec. 31, 2024 USD ($)
Virgin Atlantic
Schedule of Equity Method Investments [Line Items]
Carrying value of equity investment	$ 0
Ownership interest	49.00%
Unrecognized equity method losses	$ 480,000,000
Revolving Credit Facility \| Revolving Equipment Notes Facility
Schedule of Equity Method Investments [Line Items]
Debt instrument term	5 years
Line of credit borrowing capacity	$ 332,000,000

Equity Method Investment, Unrecognized Losses

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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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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