Earnings Per Share (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Earnings Per Share [Abstract]
Net income attributable to Cooper stockholders	$ 104,900	$ 74,100	$ 180,700	$ 125,500
Basic:
Weighted average common shares	48,959	48,400	48,900	48,400
Basic earnings per common share attributable to Cooper stockholders	$ 2.14	$ 1.53	$ 3.70	$ 2.59
Diluted:
Effect of potential dilutive common shares	500	500	600	400
Diluted weighted average common shares	49,499	48,853	49,500	48,800
Diluted earnings per common share attributable to Cooper stockholders	$ 2.12	$ 1.52	$ 3.65	$ 2.57