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DEBT - Narrative (Details) - USD ($)	1 Months Ended
	Sep. 30, 2025	Aug. 31, 2025
Revolving credit facility
Debt Instrument [Line Items]
Undrawn credit facilities	$ 3,100,000,000
Unsecured debt
Debt Instrument [Line Items]
Debt instrument amount	2,000,000,000.0
Unsecured debt | 4.95% Notes Due 2028
Debt Instrument [Line Items]
Debt instrument amount	$ 1,000,000,000.0
Interest rate per annum	4.95%
Unsecured debt | 5.25% Notes Due 2030
Debt Instrument [Line Items]
Debt instrument amount	$ 1,000,000,000.0
Interest rate per annum	5.25%
Secured debt | SkyMiles Credit Facility
Debt Instrument [Line Items]
Margin on rate	1.50%
Principal payment due annually	1.00%	20.00%
Prepayment premium	1.00%

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