Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jul. 31, 2017	Oct. 31, 2016
Goodwill [Roll Forward]
Balance, beginning	$ 2,164.7	$ 2,197.1
Net additions during the nine months ended July 31, 2017	104.7	166.0
Translation	64.2	(198.4)
Balance, ending	2,333.6	2,164.7
CooperVision
Goodwill [Roll Forward]
Balance, beginning	1,646.4	1,827.6
Net additions during the nine months ended July 31, 2017	10.3	9.1
Translation	56.6	(190.3)
Balance, ending	1,713.3	1,646.4
CooperSurgical
Goodwill [Roll Forward]
Balance, beginning	518.3	369.5
Net additions during the nine months ended July 31, 2017	94.4	156.9
Translation	7.6	(8.1)
Balance, ending	$ 620.3	$ 518.3