Business Segment Information - Business Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 2,922.5	$ 2,430.9	$ 2,653.4
Operating income (loss)	505.8	311.8	546.7
Interest expense	23.1	36.8	68.0
Other expense (income), net	(8.8)	8.5	1.3
Income before income taxes	491.5	266.5	477.4
Identifiable assets	9,606.2	6,737.5	6,274.5
Depreciation expense	163.2	149.9	135.0
Amortization expense	146.1	137.2	145.8
Capital expenditures	214.4	310.4	292.1
CooperVision
Segment Reporting Information [Line Items]
Net sales	2,152.0	1,843.0	1,972.9
CooperSurgical
Segment Reporting Information [Line Items]
Net sales	770.5	587.9	680.5
Corporate
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0
Operating income (loss)	(47.3)	(49.2)	(47.6)
Identifiable assets	244.7	207.4	173.1
Depreciation expense	0.0	0.0	0.2
Amortization expense	0.0	0.0	0.0
Capital expenditures	0.0	0.0	0.0
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Net sales	2,152.0	1,843.0	1,972.9
Operating income (loss)	481.3	375.7	506.4
Identifiable assets	6,965.9	4,236.3	3,911.6
Depreciation expense	148.3	138.2	125.8
Amortization expense	35.7	32.4	40.9
Capital expenditures	190.0	260.3	259.0
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Net sales	770.5	587.9	680.5
Operating income (loss)	71.8	(14.7)	87.9
Identifiable assets	2,395.6	2,293.8	2,189.8
Depreciation expense	14.9	11.7	9.0
Amortization expense	110.4	104.8	104.9
Capital expenditures	$ 24.4	$ 50.1	$ 33.1