RESTRUCTURING CHARGES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Restructuring and Related Costs [Line Items]
Restructuring and other charges	$ 10.8	$ 9.1	$ 19.0	$ 12.4
Amounts remaining to be incurred	25.6		25.6
Employee Separation Costs
Restructuring and Related Costs [Line Items]
Restructuring and other charges	7.8		12.3
Other restructuring costs
Restructuring and Related Costs [Line Items]
Restructuring and other charges	$ 3.0		$ 6.7