Business Segment Information (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 628.1	$ 590.0
Operating income (loss)	110.9	90.2
Interest expense	18.2	18.4
Other income, net	1.1	3.0
Income before income taxes	93.8	74.8
CooperVision
Segment Reporting Information [Line Items]
Net sales	470.1	444.8
Operating income (loss)	116.3	112.3
CooperSurgical
Segment Reporting Information [Line Items]
Net sales	158.0	145.2
Operating income (loss)	7.2	(9.3)
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)	(12.6)	(12.8)
Toric lens | CooperVision
Segment Reporting Information [Line Items]
Net sales	146.0	137.8
Multifocal lens | CooperVision
Segment Reporting Information [Line Items]
Net sales	49.1	46.9
Single-use sphere lens | CooperVision
Segment Reporting Information [Line Items]
Net sales	132.1	116.3
Non single-use sphere and other | CooperVision
Segment Reporting Information [Line Items]
Net sales	142.9	143.8
Office and surgical procedures | CooperSurgical
Segment Reporting Information [Line Items]
Net sales	95.7	88.2
Fertility | CooperSurgical
Segment Reporting Information [Line Items]
Net sales	$ 62.3	$ 57.0