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Intangible Assets - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2020 | Jul. 31, 2019 | Apr. 30, 2019 | Jul. 31, 2020 | Jul. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of goodwill in reporting units | $ 0 | $ 0 |  |  |
Asset impairments |  |  |  | $ 0 |
Gain on sale of an intangible | $ 0 | $ 0 |  | $ 0 | $ 19,000,000.0
CooperSurgical |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Proceeds from sale of exclusive distribution right to distribute Filshie Clip System in the U.S. |  |  | $ 21,000,000.0 |  |
Gain on sale of an intangible |  |  | $ 19,000,000.0 |  |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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- Definition Amount of gain (loss) on sale or disposal of intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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