Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Segment Reporting Information [Line Items]
Total net sales	$ 763.4	$ 578.2	$ 2,163.4	$ 1,749.3
Total operating income	100.6	72.0	377.3	211.7
Interest expense	5.6	5.7	18.1	30.1
Other expense (income), net	1.0	(0.1)	(10.7)	8.8
Income before income taxes	94.0	66.4	369.9	172.8
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	557.5	449.3	1,587.1	1,336.7
Total operating income	88.0	93.7	347.2	284.4
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	205.9	128.9	576.3	412.6
Total operating income	26.2	(9.3)	66.9	(33.3)
Corporate
Segment Reporting Information [Line Items]
Total operating income	(13.6)	(12.4)	(36.8)	(39.4)
Toric lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	181.0	147.6	516.1	436.3
Multifocal lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	61.6	46.9	177.3	143.8
Single-use sphere lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	159.3	126.5	449.8	380.7
Non single-use sphere, other | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	155.6	128.3	443.9	375.9
Office and surgical products | Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	122.5	81.7	338.6	249.7
Fertility | Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	$ 83.4	$ 47.2	$ 237.7	$ 162.9