Business Segment Information - Schedule of Identifiable Assets by Segment (Details) - USD ($) $ in Millions	Jan. 31, 2021	Oct. 31, 2020
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 8,921.9	$ 6,737.5
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total Identifiable assets	6,423.2	4,236.3
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total Identifiable assets	2,297.7	2,293.8
Corporate
Segment Reporting Information [Line Items]
Total Identifiable assets	$ 201.0	$ 207.4