Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 103.6	$ 88.2	$ 284.3	$ 214.4
Other comprehensive income (loss):
Foreign currency translation adjustment	38.3	(126.8)	104.8	(188.3)
Comprehensive income (loss)	141.9	(38.6)	389.1	26.1
Less: comprehensive income attributable to noncontrolling interests	0.0	0.3	0.0	1.0
Comprehensive income (loss) attributable to Cooper stockholders	$ 141.9	$ (38.9)	$ 389.1	$ 25.1