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Schedule II - Consolidated Valuation and Qualifying Accounts and Reserves (Detail) - USD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Allowance for Doubtful Accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 16.8 $ 13.5 $ 17.1
Charged to Costs and Expenses 0.2 7.5 3.8
Charged to Other Accounts (3.7) (4.2) (7.4)
Deductions (1.5)    
Balance at End of Period 11.8 16.8 13.5
Environmental Reserves [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 24.7 26.8 27.5
Charged to Costs and Expenses 1.7 0.7 2.6
Charged to Other Accounts (16.8) (2.0) (3.9)
Deductions (1.4) (0.8) 0.6
Balance at End of Period $ 8.2 $ 24.7 $ 26.8