Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

RESTRUCTURING CHARGES - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Restructuring and Related Costs [Line Items]
Restructuring charges	$ 19.1	$ 9.1	$ 26.8	$ 20.3
Amounts remaining to be incurred	22.4		22.4
Employee Separation Costs
Restructuring and Related Costs [Line Items]
Restructuring charges	16.9		22.0
Other Costs
Restructuring and Related Costs [Line Items]
Restructuring charges	$ 2.2		$ 4.8