Business Segment Information (Schedule of Identifiable Assets By Segment Information) (Details) - USD ($) $ in Millions	Jul. 31, 2017	Oct. 31, 2016
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 4,782.8	$ 4,478.6
CooperVision
Segment Reporting Information [Line Items]
Total Identifiable assets	3,515.8	3,382.4
CooperSurgical
Segment Reporting Information [Line Items]
Total Identifiable assets	1,116.2	907.1
Corporate
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 150.8	$ 189.1