Intangible Assets - Narrative (Details)	3 Months Ended	12 Months Ended
Jul. 31, 2021 USD ($)	Oct. 31, 2021 USD ($) reporting_unit	Oct. 31, 2020 USD ($)
Goodwill [Line Items]
Goodwill impairment	$ 0	$ 0	$ 0
Number of reporting units \| reporting_unit		3
Impairment of definite-lived intangible assets		$ 0
Impairment of indefinite-lived intangible assets		0
CooperSurgical
Goodwill [Line Items]
Goodwill deductible for tax purposes		137,200,000	134,200,000
CooperVision
Goodwill [Line Items]
Goodwill deductible for tax purposes		$ 24,600,000	$ 26,900,000

The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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