Schedule II - Valuation and Qualifying Accounts (Detail) - Accounts receivable allowances - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 35.5	$ 22.4	$ 19.2
Additions from Able Acquisition	1.3	0.0	0.0
Charges to Costs and Expenses	44.3	96.3	87.7
Write-offs/Allowance Taken	(48.4)	(83.2)	(84.6)
Balance End of Year	$ 32.7	$ 35.5	$ 22.4