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Stock-Based Compensation (Stock-Based Compensation, Unrecognized Compensation Expense And Weighted-Average Period) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Jan. 31, 2015
Stock options  
Share-based Compensation Arrangement by Share-based Payment Award  
Unrecognized Compensation Expense $ 5,791us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Weighted-Average Period (in years) 1 year 4 months 28 days
Restricted stock units, including stock units with market conditions (altogether “RSUs”)  
Share-based Compensation Arrangement by Share-based Payment Award  
Unrecognized Compensation Expense 130,468us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
Weighted-Average Period (in years) 2 years 0 months 14 days
Employee stock purchase plan (“ESPP”)  
Share-based Compensation Arrangement by Share-based Payment Award  
Unrecognized Compensation Expense $ 12,005us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
Weighted-Average Period (in years) 0 years 11 months 12 days