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Restructuring Charges - Reconciliation of Beginning and Ending Restructuring Reserve Balances (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2011
Restructuring Cost and Reserve [Line Items]          
Beginning balance     $ 8.0 $ 19.6  
Costs incurred and charged to expense 3.4 10.5 8.8 33.4 30.5
Costs paid or otherwise settled     (13.8) (45.0)  
Ending balance 3.0 8.0 3.0 8.0 19.6
Employee Separation Costs [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance     6.2 11.8  
Costs incurred and charged to expense     2.8 13.4 13.3
Costs paid or otherwise settled     (7.2) (19.0)  
Ending balance 1.8 6.2 1.8 6.2 11.8
Other Restructuring Costs [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance     1.8 7.6  
Costs incurred and charged to expense     2.0 9.8 12.7
Costs paid or otherwise settled     (2.6) (15.6)  
Ending balance 1.2 1.8 1.2 1.8 7.6
Asset Impairments [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance       0.2  
Costs incurred and charged to expense     4.0 10.2  
Costs paid or otherwise settled     (4.0) (10.4)  
Ending balance            
Inventory Write-Down [Member]
          
Restructuring Cost and Reserve [Line Items]          
Beginning balance            
Costs incurred and charged to expense            
Costs paid or otherwise settled            
Ending balance