Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Goodwill [Roll Forward]
Balance, beginning	$ 2,447.3	$ 2,428.9
Net additions	91.6	15.3
Foreign currency translation adjustment	58.3	3.1
Amount reclassified to assets held for sale	(23.2)
Balance, ending	2,574.0	2,447.3
CooperVision
Goodwill [Roll Forward]
Balance, beginning	1,779.3	1,765.4
Net additions	30.2	13.5
Foreign currency translation adjustment	54.7	0.4
Amount reclassified to assets held for sale	(23.2)
Balance, ending	1,841.0	1,779.3
CooperSurgical
Goodwill [Roll Forward]
Balance, beginning	668.0	663.5
Net additions	61.4	1.8
Foreign currency translation adjustment	3.6	2.7
Amount reclassified to assets held for sale	0.0
Balance, ending	$ 733.0	$ 668.0