XML 107 R85.htm IDEA: XBRL DOCUMENT
v3.21.2

Employee Benefits - Weighted-Average Asset Allocations by Asset Category (Details) | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019
--- | --- | --- | ---
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Asset allocation | 100.00% | 100.00% | 100.00%
Cash and cash equivalents |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Asset allocation | 5.00% | 11.80% | 3.20%
Equity mutual funds |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Asset allocation | 62.80% | 57.70% | 63.70%
Hedging Strategy Funds |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Asset allocation | 4.70% | 4.30% | 4.90%
Bond mutual funds |  |  |
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |  |
Asset allocation | 27.50% | 26.20% | 28.20%

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsAllocationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=coo_BondMutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |