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Restructuring and Integration Costs Restructuring and Integration Costs (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2015 | Apr. 30, 2015 | Oct. 31, 2014
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Activities, Completion Date |  | Jan. 31, 2016 |
Sauflon [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | $ 62.0 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember | $ 62.0 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember |
Additions during the period |  | 9.7 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember | 36.1 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember
Integration Costs | 8.0 us-gaap_BusinessCombinationIntegrationRelatedCosts / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember | 14.1 us-gaap_BusinessCombinationIntegrationRelatedCosts / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember | 2.8 us-gaap_BusinessCombinationIntegrationRelatedCosts / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember
Sauflon [Member] | Employee Severance [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 22.0 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember | 22.0 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |
Additions during the period |  | (4.2)us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember | 20.3 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Sauflon [Member] | Employee Severance [Member] | Selling, general and administrative expense [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Additions during the period | (4.5)us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |  | 19.7 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Sauflon [Member] | Employee Severance [Member] | Research and development expense [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Additions during the period | 0.2 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember | 0.3 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember | 0.6 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Sauflon [Member] | Facility Closing [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Additions during the period |  | 0 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember | 0.5 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember
Sauflon [Member] | Facility Closing [Member] | Selling, general and administrative expense [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Additions during the period |  |  | 0.5 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember
Sauflon [Member] | Product Rationalization [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 40.0 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember | 40.0 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember |
Additions during the period |  | 13.9 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember | 15.3 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember
Sauflon [Member] | Product Rationalization [Member] | Cost of sales [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Additions during the period | $ 5.2 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember | $ 13.9 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember | $ 15.3 us-gaap_RestructuringCharges / us-gaap_BusinessAcquisitionAxis = coo_SauflonMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember / us-gaap_RestructuringCostAndReserveAxis = coo_ProductRationalizationMember

X
- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
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- Definition Date the exit and disposal activities were completed or are expected to be completed, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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