RESTRUCTURING CHARGES - Reconciliation of Beginning and Ended Restructuring Reserve Balances (Details) - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Sep. 30, 2025	Oct. 31, 2024
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 4.9	$ 16.8
Costs incurred and charged to expense	40.3	5.4
Costs paid or otherwise settled	(23.5)	(17.3)
Restructuring reserve, ending balance	21.7	4.9
Employee Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	4.8	16.4
Costs incurred and charged to expense	28.2	(1.4)
Costs paid or otherwise settled	(11.7)	(10.2)
Restructuring reserve, ending balance	21.3	4.8
Other Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.1	0.4
Costs incurred and charged to expense	12.1	6.8
Costs paid or otherwise settled	(11.8)	(7.1)
Restructuring reserve, ending balance	$ 0.4	$ 0.1