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Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2018 | Oct. 31, 2017
Goodwill [Roll Forward] |  |
Balance, beginning | $ 2,354.8 | $ 2,164.7
Net additions during the six months ended April 30, 2018 | 68.4 | 123.0
Translation | 37.9 | 67.1
Balance, ending | 2,461.1 | 2,354.8
CooperVision |  |
Goodwill [Roll Forward] |  |
Balance, beginning | 1,735.7 | 1,646.4
Net additions during the six months ended April 30, 2018 | 36.8 | 28.6
Translation | 34.1 | 60.7
Balance, ending | 1,806.6 | 1,735.7
CooperSurgical |  |
Goodwill [Roll Forward] |  |
Balance, beginning | 619.1 | 518.3
Net additions during the six months ended April 30, 2018 | 31.6 | 94.4
Translation | 3.8 | 6.4
Balance, ending | $ 654.5 | $ 619.1

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