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Commitments and Contingencies - Additional Information (Detail)
ft² in Thousands, $ in Millions
 12 Months Ended
Oct. 10, 2014
USD ($)
Oct. 31, 2016
USD ($)
ft²
Building
Oct. 31, 2015
USD ($)
Oct. 31, 2014
USD ($)
Loss Contingencies [Line Items]        
Rent expenses   $ 63.9 $ 67.6 $ 65.6
Number of buildings to be leased | Building   2    
Total square feet of buildings | ft²   341    
Lease renewal term, in years   10 years    
Second lease renewal term, years   9 years    
Mentor litigation        
Loss Contingencies [Line Items]        
Jury verdict assessing damages, value $ 36.0