Business Segment Information - Schedule of Identifiable Assets by Segment (Details) - USD ($) $ in Millions	Jul. 31, 2020	Oct. 31, 2019
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 6,748.4	$ 6,274.5
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total Identifiable assets	4,240.8	3,911.6
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total Identifiable assets	2,290.7	2,189.8
Corporate
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 216.9	$ 173.1