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DEBT - Interest Rate Swap Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Interest Rate Swap, Instrument 1
Derivative [Line Items]
Notional amount	$ 150.0
Fixed rate (percentage)	3.37%
Interest Rate Swap, Instrument 2
Derivative [Line Items]
Notional amount	$ 50.0
Fixed rate (percentage)	3.34%
Interest Rate Swap, Instrument 3
Derivative [Line Items]
Notional amount	$ 100.0
Fixed rate (percentage)	4.74%
Interest Rate Swap, Instrument 4
Derivative [Line Items]
Notional amount	$ 150.0
Fixed rate (percentage)	4.25%
Designated as Hedging Instruments | Interest rate swap agreements
Derivative [Line Items]
Cash payment from terminated interest rate swap agreement	$ 11.0
Notional amount	$ 450.0	$ 600.0

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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- Definition

The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

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