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Employee Benefit Plans - Defined Contribution Plans (Details)
$ in Millions
12 Months Ended
Oct. 31, 2016
USD ($)
defined_contribution_plan
Oct. 31, 2015
USD ($)
Oct. 31, 2014
USD ($)
Compensation and Retirement Disclosure [Abstract]      
Number of Defined Contribution Plans | defined_contribution_plan 3    
Cost Recognized | $ $ 11.7 $ 12.1 $ 10.0