Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2020	Oct. 31, 2019
Goodwill [Roll Forward]
Balance, beginning	$ 2,428.9	$ 2,392.1
Net additions	15.3	36.1
Foreign currency translation adjustment	3.1	0.7
Balance, ending	2,447.3	2,428.9
CooperVision
Goodwill [Roll Forward]
Balance, beginning	1,765.4	1,742.9
Net additions	13.5	14.1
Foreign currency translation adjustment	0.4	8.4
Balance, ending	1,779.3	1,765.4
CooperSurgical
Goodwill [Roll Forward]
Balance, beginning	663.5	649.2
Net additions	1.8	22.0
Foreign currency translation adjustment	2.7	(7.7)
Balance, ending	$ 668.0	$ 663.5

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 45
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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