Business Segment Information (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 590.0	$ 499.1
Operating income (loss)	90.2	90.7
Interest expense	18.4	7.3
Other (income) expense, net	(3.0)	3.3
Income before income taxes	74.8	80.1
CooperVision
Segment Reporting Information [Line Items]
Net sales	444.8	389.3
Operating income (loss)	112.3	87.3
CooperSurgical
Segment Reporting Information [Line Items]
Net sales	145.2	109.8
Operating income (loss)	(9.3)	16.4
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)	(12.8)	(13.0)
Toric lens | CooperVision
Segment Reporting Information [Line Items]
Net sales	137.8	120.7
Multifocal lens | CooperVision
Segment Reporting Information [Line Items]
Net sales	46.9	42.4
Single-use sphere lens | CooperVision
Segment Reporting Information [Line Items]
Net sales	116.3	99.5
Non single-use sphere and other | CooperVision
Segment Reporting Information [Line Items]
Net sales	$ 143.8	$ 126.7