EXIT AND DISPOSAL ACTIVITIES - Schedule of Costs Incurred and Cumulative Costs by Cost Type (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Restructuring Cost and Reserve [Line Items]
Exit and disposal costs	$ 1.0	$ 9.3	$ 10.4
Termination Benefits
Restructuring Cost and Reserve [Line Items]
Exit and disposal costs	0.6	8.2	10.2
Other Costs
Restructuring Cost and Reserve [Line Items]
Exit and disposal costs	$ 0.4	$ 1.1	$ 0.2