Business Segment Information (Schedule of Identifiable Assets By Segment Information) (Details) - USD ($) $ in Millions	Apr. 30, 2017	Oct. 31, 2016
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 4,749.8	$ 4,478.6
CooperVision
Segment Reporting Information [Line Items]
Total Identifiable assets	3,454.0	3,382.4
CooperSurgical
Segment Reporting Information [Line Items]
Total Identifiable assets	1,086.4	907.1
Corporate
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 209.4	$ 189.1