Earnings Per Share (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Earnings Per Share [Abstract]
Net income attributable to Cooper stockholders	$ 103,600	$ 87,900	$ 284,300	$ 213,400
Basic:
Weighted average common shares	48,900	48,600	48,900	48,400
Basic earnings per common share attributable to Cooper stockholders	$ 2.12	$ 1.81	$ 5.81	$ 4.41
Diluted:
Effect of potential dilutive common shares	700	400	600	500
Diluted weighted average common shares	49,600	49,000	49,500	48,900
Diluted earnings per common share attributable to Cooper stockholders	$ 2.09	$ 1.79	$ 5.74	$ 4.36