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Schedule II-Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Accounts receivable allowances      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance Beginning of Year $ 9.2 $ 8.3 $ 9.1
Charges to Costs and Expenses 17.2 17.8 20.3
Write-offs/Allowance Taken [1] (17.8) (16.9) (21.1)
Balance End of Year 8.6 9.2 8.3
Valuation allowance of deferred tax assets      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance Beginning of Year 6.2 6.2 6.0
Charges to Costs and Expenses 0.1 0.3 0.8
Write-offs/Allowance Taken [1] (0.8) (0.3) (0.6)
Balance End of Year $ 5.5 $ 6.2 $ 6.2
[1] Write-offs are net of recoveries