Consolidated Statements of Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Income Statement [Abstract]
Net sales	$ 631,300	$ 522,400	$ 1,221,300	$ 1,021,500
Cost of sales	226,800	178,500	445,900	365,300
Gross profit	404,500	343,900	775,400	656,200
Selling, general and administrative expense	247,900	193,300	473,800	381,900
Research and development expense	20,800	16,800	39,700	33,100
Amortization of intangibles	36,700	16,700	72,700	33,400
Impairment of intangibles	24,400	0	24,400	0
Operating income	74,700	117,100	164,800	207,800
Interest expense	18,700	7,700	37,100	15,000
Other expense (income), net	2,000	(100)	(1,100)	3,200
Income before income taxes	54,000	109,500	128,800	189,600
(Benefit) provision for income taxes	(6,900)	4,600	190,400	8,900
Net income (loss) attributable to Cooper stockholders	$ 60,900	$ 104,900	$ (61,600)	$ 180,700
Earnings (loss) per share attributable to Cooper stockholders - basic (in dollars per share)	$ 1.24	$ 2.14	$ (1.26)	$ 3.70
Earnings (loss) per share attributable to Cooper stockholders - diluted (in dollars per share)	$ 1.23	$ 2.12	$ (1.26)	$ 3.65
Number of shares used to compute earnings (loss) per share:
Basic (shares)	49,100	49,000	49,000	48,900
Diluted (shares)	49,600	49,500	49,000	49,500