Schedule II - Valuation and Qualifying Accounts for Deferred Income Tax Valuation Allowance (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Year	$ 45.3	$ 41.5	$ 39.1
Additions	8.8	5.9	3.9
Reductions/ Charges	(2.3)	(2.1)	(1.5)
Balance at End of Year	$ 51.8	$ 45.3	$ 41.5