PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Finance leases	$ 138.4	$ 136.9
Property, plant and equipment	724.2	704.7
Accumulated depreciation	(454.7)	(429.6)
Property, plant and equipment, net	269.5	275.1
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	84.8	83.4
Machinery, equipment and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	337.0	330.1
Computer software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	139.5	136.2
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 24.5	$ 18.1

Amount, before accumulated amortization, of right-of-use asset from finance lease.

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount, before accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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