Business Segment Information - Schedule of Identifiable Assets by Segment (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 9,013.8	$ 6,737.5
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total Identifiable assets	6,442.2	4,236.3
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total Identifiable assets	2,374.9	2,293.8
Corporate
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 196.7	$ 207.4