Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 238.4	$ 466.7	$ 139.9
Other comprehensive loss:
Cash flow hedges, net of tax (benefit) of $(4.1) in fiscal 2020	(13.0)	0.0	0.0
Change in minimum pension liability, net of tax (benefit) provision of $(4.0), $(8.0) and $3.1, respectively	(12.8)	(25.4)	7.9
Foreign currency translation adjustment	0.9	9.0	(58.5)
Other comprehensive loss	(24.9)	(16.4)	(50.6)
Comprehensive income	213.5	450.3	89.3
Comprehensive income attributable to Cooper stockholders	$ 213.5	$ 450.3	$ 89.3