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Restructuring Charges - Reconciliation of Beginning and Ending Restructuring Reserve Balances (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Restructuring Cost and Reserve [Line Items]    
Beginning balance $ 3.0  
Costs incurred and charged to expense 2.6 1.3
Costs paid or otherwise settled (1.6)  
Ending balance 4.0  
Employee separation costs [Member]
    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 1.8  
Costs incurred and charged to expense 2.4  
Costs paid or otherwise settled (1.3)  
Ending balance 2.9  
Other restructuring costs [Member]
    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 1.2  
Costs paid or otherwise settled (0.1)  
Ending balance 1.1  
Asset impairments [Member]
    
Restructuring Cost and Reserve [Line Items]    
Beginning balance     
Costs incurred and charged to expense 0.2  
Costs paid or otherwise settled (0.2)  
Ending balance