Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jul. 31, 2019	Oct. 31, 2018
Goodwill [Roll Forward]
Beginning balance	$ 2,392.1	$ 2,354.8
Net additions	35.8	71.2
Translation	(36.5)	(33.9)
Ending balance	2,391.4	2,392.1
CooperVision
Goodwill [Roll Forward]
Beginning balance	1,742.9	1,735.7
Net additions	13.8	36.8
Translation	(33.0)	(29.6)
Ending balance	1,723.7	1,742.9
CooperSurgical
Goodwill [Roll Forward]
Beginning balance	649.2	619.1
Net additions	22.0	34.4
Translation	(3.5)	(4.3)
Ending balance	$ 667.7	$ 649.2