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Stock-Based Benefit Plans (Details Textual) (USD $)
In Millions, unless otherwise specified
Jan. 31, 2015
Oct. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 39.7us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized $ 24.0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized