SCHEDULE II - VALULATION AND QUALIFYING ACCOUNTS (Detail) - Accounts receivable allowances - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 25.0	$ 22.6	$ 32.7
Additions from Acquisitions	0.3	0.0	1.4
Charges to Costs and Expenses	88.7	76.0	60.6
Write-offs/Allowance Taken	(91.3)	(73.6)	(72.1)
Balance End of Year	$ 22.8	$ 25.0	$ 22.6