Business Segment Information (Schedule of Identifiable Assets By Segment Information) (Details) - USD ($) $ in Millions	Apr. 30, 2019	Oct. 31, 2018
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 6,203.4	$ 6,112.8
CooperVision
Segment Reporting Information [Line Items]
Total Identifiable assets	3,833.3	3,746.0
CooperSurgical
Segment Reporting Information [Line Items]
Total Identifiable assets	2,191.4	2,201.7
Corporate
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 178.7	$ 165.1