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Employee Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Apr. 30, 2014
Apr. 30, 2015
Apr. 30, 2014
General Discussion of Pension and Other Postretirement Benefits [Abstract]      
Company's contribution to the pension plan $ 3.4us-gaap_DefinedBenefitPlanContributionsByEmployer $ 2.5us-gaap_DefinedBenefitPlanContributionsByEmployer $ 4.5us-gaap_DefinedBenefitPlanContributionsByEmployer
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year   $ 7.5us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear  
Expected rate of return on plan assets for determining net periodic pension cost   8.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets