RESTRUCTURING CHARGES - Reconciliation of Beginning and Ended Restructuring Reserve Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Restructuring Reserve [Roll Forward]
Beginning balance	$ 21.6	$ 11.3
Costs incurred and charged to expense	23.1	38.7	$ 26.1
Costs paid or otherwise settled	(24.4)	(28.4)
Ending balance	20.3	21.6	11.3
Employee Separation Costs
Restructuring Reserve [Roll Forward]
Beginning balance	17.9	9.5
Costs incurred and charged to expense	14.9	26.4	22.5
Costs paid or otherwise settled	(14.2)	(18.0)
Ending balance	18.6	17.9	9.5
Other Costs
Restructuring Reserve [Roll Forward]
Beginning balance	3.7	1.8
Costs incurred and charged to expense	8.2	12.3	3.6
Costs paid or otherwise settled	(10.2)	(10.4)
Ending balance	$ 1.7	$ 3.7	$ 1.8