Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 104,900	$ 74,400	$ 180,700	$ 126,200
Other comprehensive income (loss):
Foreign currency translation adjustment	38,300	52,300	66,500	(61,500)
Comprehensive income	143,200	126,700	247,200	64,700
Less: comprehensive income attributable to noncontrolling interests	0	700	0	700
Comprehensive income attributable to Cooper stockholders	$ 143,200	$ 126,000	$ 247,200	$ 64,000