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DERIVATIVES AND HEDGING ACTIVITIES - Schedule of Notional Amounts (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 57	$ 214
Derivative Liability, Fair Value, Gross Liability	10	4
Interest Rate Cap
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	20	53
Derivative Liability, Fair Value, Gross Liability	1	1
Interest Rate Collar
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	3	17
Derivative Liability, Fair Value, Gross Liability	8	0
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	34	144
Derivative Liability, Fair Value, Gross Liability	$ 1	$ 3

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