Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2019	Oct. 31, 2018
Goodwill [Roll Forward]
Balance, beginning	$ 2,392.1	$ 2,354.8
Net additions during the three months ended January 31, 2019	35.8	71.2
Translation	21.4	(33.9)
Balance, ending	2,449.3	2,392.1
CooperVision
Goodwill [Roll Forward]
Balance, beginning	1,742.9	1,735.7
Net additions during the three months ended January 31, 2019	13.9	36.8
Translation	19.9	(29.6)
Balance, ending	1,776.7	1,742.9
CooperSurgical
Goodwill [Roll Forward]
Balance, beginning	649.2	619.1
Net additions during the three months ended January 31, 2019	21.9	34.4
Translation	1.5	(4.3)
Balance, ending	$ 672.6	$ 649.2