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Employee Benefits (Narrative) (Details) (USD $)
12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Nov. 02, 2012
Defined Benefit Plan Disclosure [Line Items]        
Estimated net loss in the next fiscal year $ 987,000us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss      
Estimated net transition obligation in the next fiscal year 0us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation      
Estimated prior service cost in the next fiscal year 4,000us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit      
Discount rate for determining benefit obligations at year end 4.25%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 4.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 3.75%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate  
Projected defined benefit plan benefit obligation 93,000,000coo_ProjectedDefinedBenefitPlanBenefitObligation      
Projected defined accumulated benefit obligation 81,900,000coo_ProjectedAccumulatedDefinedBenefitObligation      
Diversified portfolio, allocation of assets in equities 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations  
Expected long-term return on diversifed portfolio 8.00%coo_DefinedBenefitPlanExpectedLongTermReturnOnDiversifiedPortfolio     8.50%coo_DefinedBenefitPlanExpectedLongTermReturnOnDiversifiedPortfolio
Company's contribution to the pension plan 8,788,000us-gaap_DefinedBenefitPlanContributionsByEmployer 6,234,000us-gaap_DefinedBenefitPlanContributionsByEmployer 5,226,000us-gaap_DefinedBenefitPlanContributionsByEmployer  
Expected future contribution in pension plan 10,000,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 75.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent      
Deferral contributions, net of forfeiture credits $ 4,000,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution $ 3,400,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution $ 2,900,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution  
Minimum [Member] | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Diversified portfolio, allocation of assets in equities 50.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Maximum [Member] | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Diversified portfolio, allocation of assets in equities 80.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember