Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 466.7	$ 139.9	$ 372.9
Other comprehensive income (loss):
Foreign currency translation adjustment	9.0	(58.5)	107.7
Change in minimum pension liability, net of tax (benefit) provision of $(8.0), $3.1 and $4.2, respectively	(25.4)	7.9	6.6
Other comprehensive (loss) income	(16.4)	(50.6)	114.3
Comprehensive income	450.3	89.3	487.2
Comprehensive income attributable to Cooper stockholders	$ 450.3	$ 89.3	$ 487.2