Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Segment Reporting Information [Line Items]
Total net sales	$ 719.5	$ 524.9	$ 1,400.0	$ 1,171.1
Total operating income	143.2	28.6	276.6	139.7
Interest expense	6.1	12.8	12.5	24.4
Other expense (income), net	0.7	6.8	(11.8)	8.9
Income before income taxes	136.4	9.0	275.9	106.4
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	522.6	402.2	1,029.6	887.4
Total operating income	131.7	67.7	259.2	190.6
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	196.9	122.7	370.4	283.7
Total operating income	23.1	(25.6)	40.6	(23.9)
Corporate
Segment Reporting Information [Line Items]
Total operating income	(11.6)	(13.5)	(23.2)	(27.0)
Toric lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	172.8	133.6	335.1	288.7
Multifocal lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	58.0	45.1	115.7	96.9
Single-use sphere lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	144.5	116.1	290.5	254.2
Non single-use sphere, other | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	147.3	107.4	288.3	247.6
Office and surgical products | Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	112.6	69.6	216.1	168.0
Fertility | Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	$ 84.3	$ 53.1	$ 154.3	$ 115.7