Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Segment Reporting Information [Line Items]
Total net sales	$ 942.6	$ 877.4	$ 1,874.2	$ 1,735.9
Total operating income	161.7	96.3	314.8	245.8
Interest expense	28.9	26.1	58.8	52.2
Other expense, net	2.8	4.6	6.0	5.9
Income before income taxes	130.0	65.6	250.0	187.7
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	635.9	589.3	1,257.4	1,170.6
Total operating income	160.2	137.9	315.0	298.0
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	306.7	288.1	616.8	565.3
Total operating income	21.6	(24.3)	45.6	(18.5)
Operating Segments | Toric and multifocal | CooperVision
Segment Reporting Information [Line Items]
Total net sales	310.3	280.4	607.6	542.0
Operating Segments | Sphere, other | CooperVision
Segment Reporting Information [Line Items]
Total net sales	325.6	308.9	649.8	628.6
Operating Segments | Office and surgical | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	182.9	163.0	374.0	328.2
Operating Segments | Fertility | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	123.8	125.1	242.8	237.1
Corporate
Segment Reporting Information [Line Items]
Total operating income	$ (20.1)	$ (17.3)	$ (45.8)	$ (33.7)