RESTRUCTURING CHARGES - Reconciliation of Beginning and Ending Restructuring Reserve Balances (Details) $ in Millions	3 Months Ended
	Dec. 31, 2025 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 21.7
Costs incurred and charged to expense	8.2
Costs paid or otherwise settled	(10.7)
Restructuring reserve, ending balance	19.2
Employee Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	21.3
Costs incurred and charged to expense	4.5
Costs paid or otherwise settled	(7.2)
Restructuring reserve, ending balance	18.6
Other Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.4
Costs incurred and charged to expense	3.7
Costs paid or otherwise settled	(3.5)
Restructuring reserve, ending balance	$ 0.6