PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 664.3	$ 641.4
Accumulated depreciation	(400.5)	(381.2)
Property, plant and equipment, net	263.8	260.2
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	75.7	83.5
Machinery, equipment and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment	394.1	383.0
Finance leases
Property, Plant and Equipment [Line Items]
Property, plant and equipment	139.8	146.1
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 54.7	$ 28.8