Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Apr. 30, 2017	Oct. 31, 2016
Goodwill [Roll Forward]
Balance, beginning	$ 2,164.7	$ 2,197.1
Net (reductions) additions during the six months ended April 30, 2017	93.7	166.0
Translation	44.3	(198.4)
Balance, ending	2,302.7	2,164.7
CooperVision
Goodwill [Roll Forward]
Balance, beginning	1,646.4	1,827.6
Net (reductions) additions during the six months ended April 30, 2017	(1.1)	9.1
Translation	43.4	(190.3)
Balance, ending	1,688.7	1,646.4
CooperSurgical
Goodwill [Roll Forward]
Balance, beginning	518.3	369.5
Net (reductions) additions during the six months ended April 30, 2017	94.8	156.9
Translation	0.9	(8.1)
Balance, ending	$ 614.0	$ 518.3

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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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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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