Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Segment Reporting Information [Line Items]
Total net sales	$ 1,002.3	$ 942.6	$ 1,967.0	$ 1,874.2
Total operating income	184.8	161.7	366.8	314.8
Interest expense	24.2	28.9	50.2	58.8
Other expense, net	16.1	2.8	18.8	6.0
Income before income taxes	144.5	130.0	297.8	250.0
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	669.6	635.9	1,315.7	1,257.4
Total operating income	186.4	160.2	370.3	315.0
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	332.7	306.7	651.3	616.8
Total operating income	23.7	21.6	43.9	45.6
Operating Segments | Toric and multifocal | CooperVision
Segment Reporting Information [Line Items]
Total net sales	328.4	310.3	647.8	607.6
Operating Segments | Sphere, other | CooperVision
Segment Reporting Information [Line Items]
Total net sales	341.2	325.6	667.9	649.8
Operating Segments | Office and surgical | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	205.8	182.9	404.7	374.0
Operating Segments | Fertility | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	126.9	123.8	246.6	242.8
Corporate
Segment Reporting Information [Line Items]
Total operating income	$ (25.3)	$ (20.1)	$ (47.4)	$ (45.8)