DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Values of the Company's Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Total derivatives instruments	$ (5.0)	$ (7.5)
Designated as Hedging Instruments \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Total derivatives instruments	(4.6)	(3.6)
Designated as Hedging Instruments \| Interest rate swap agreements \| Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	0.5	0.9
Designated as Hedging Instruments \| Interest rate swap agreements \| Other current liabilities \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative liability	(0.8)	(0.2)
Designated as Hedging Instruments \| Interest rate swap agreements \| Other liabilities \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative liability	(3.2)	(5.1)
Designated as Hedging Instruments \| Commodity hedging instruments \| Prepaid and other current assets \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative asset	0.0	0.8
Designated as Hedging Instruments \| Commodity hedging instruments \| Other current liabilities \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative liability	(1.1)	0.0
Derivatives not designated as Hedging Instruments \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Total derivatives instruments	(0.4)	(3.9)
Derivatives not designated as Hedging Instruments \| Commodity hedging instruments \| Other current liabilities \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative liability	(0.1)	0.0
Derivatives not designated as Hedging Instruments \| Currency forward contracts \| Prepaid and other current assets \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative asset	0.0	0.1
Derivatives not designated as Hedging Instruments \| Currency forward contracts \| Other current liabilities \| Fair value, inputs, level 2
Derivatives, Fair Value [Line Items]
Derivative liability	$ (0.3)	$ (4.0)

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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