Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Segment Reporting Information [Line Items]
Total net sales	$ 1,060.3	$ 1,002.8	$ 3,027.3	$ 2,877.0
Total operating income	175.7	192.5	542.5	507.3
Interest expense	25.4	28.5	75.6	87.3
Other (income) expense, net	(1.6)	0.3	17.2	6.3
Income before income taxes	151.9	163.7	449.7	413.7
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	718.4	675.6	2,034.1	1,933.0
Total operating income	202.6	172.7	572.9	487.7
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	341.9	327.2	993.2	944.0
Total operating income	(4.2)	41.3	39.7	86.9
Operating Segments | Toric and multifocal | CooperVision
Segment Reporting Information [Line Items]
Total net sales	358.8	326.4	1,006.6	934.0
Operating Segments | Sphere, other | CooperVision
Segment Reporting Information [Line Items]
Total net sales	359.6	349.2	1,027.5	999.0
Operating Segments | Office and surgical | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	204.8	197.9	609.5	571.9
Operating Segments | Fertility | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	137.1	129.3	383.7	372.1
Corporate
Segment Reporting Information [Line Items]
Total operating income	$ (22.7)	$ (21.5)	$ (70.1)	$ (67.3)