Schedule II-Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2016		Oct. 31, 2015		Oct. 31, 2014
Accounts receivable allowances
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year		$ 8.6	[1]	$ 9.2		$ 8.3
Charges to Costs and Expenses		29.1	[1]	17.2		17.8
Write-offs/Allowance Taken	[2]	(19.6)	[1]	(17.8)		(16.9)
Balance End of Year		18.1	[1]	8.6	[1]	9.2
Valuation allowance of deferred tax assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year		5.5		6.2		6.2
Charges to Costs and Expenses		0.0		0.1		0.3
Write-offs/Allowance Taken	[2]	(0.1)		(0.8)		(0.3)
Balance End of Year		$ 5.4		$ 5.5		$ 6.2

[1] Includes amounts that are classified as held for sale.

[2] Write-offs are net of recoveries.