RESTRUCTURING CHARGES - Reconciliation of Beginning and Ending Restructuring Reserve Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 20.3
Costs incurred and charged to expense	3.5	$ 3.1
Costs paid or otherwise settled	(6.8)
Restructuring reserve, ending balance	17.0
Employee Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	18.6
Costs incurred and charged to expense	1.6
Costs paid or otherwise settled	(4.4)
Restructuring reserve, ending balance	15.8
Other Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	1.7
Costs incurred and charged to expense	1.9
Costs paid or otherwise settled	(2.4)
Restructuring reserve, ending balance	$ 1.2