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Employee Benefits (Schedule of Weighted-Average Assumptions Used in Computing Net Periodic Pension Cost and Projected Benefit Obligation) (Details)
12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Compensation and Retirement Disclosure [Abstract]      
Discount rate for determining net periodic pension cost 4.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 3.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 4.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Discount rate for determining benefit obligations at year end 4.25%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 4.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 3.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Rate of compensation increase for determining expense 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease
Rate of compensation increase for determining benefit obligations at year end 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
Expected rate of return on plan assets for determining net periodic pension cost 8.00%coo_DefinedBenefitPlanExpectedRateOfReturnOnPlanAssetsForDeterminingNetPeriodicPensionCost 8.00%coo_DefinedBenefitPlanExpectedRateOfReturnOnPlanAssetsForDeterminingNetPeriodicPensionCost 8.50%coo_DefinedBenefitPlanExpectedRateOfReturnOnPlanAssetsForDeterminingNetPeriodicPensionCost
Expected rate of return on plan assets at year end 8.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 8.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 8.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Measurement date for determining assets and benefit obligations at year end 10/31/2014 10/31/2013 10/31/2012