Restructuring and Integration Costs (Details) - Sauflon [Member] - USD ($)	6 Months Ended	12 Months Ended
	Apr. 30, 2017	Oct. 31, 2016
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016	$ 0	$ 148,300,000
Restructuring Reserve [Roll Forward]
Balance, beginning	3,100,000	8,900,000
Additions (reductions) during the period		56,600,000
Payments during the period	(1,500,000)	(5,400,000)
Non-cash adjustments	(1,000,000)	(57,000,000)
Balance, ending	600,000	3,100,000
Employee-related
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016		17,800,000
Restructuring Reserve [Roll Forward]
Balance, beginning	2,800,000	8,600,000
Additions (reductions) during the period		0
Payments during the period	(1,500,000)	(5,200,000)
Non-cash adjustments	(700,000)	(600,000)
Balance, ending	600,000	2,800,000
Facilities-related
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016		1,100,000
Restructuring Reserve [Roll Forward]
Balance, beginning	300,000	300,000
Additions (reductions) during the period		200,000
Payments during the period	0	(200,000)
Non-cash adjustments	(300,000)	0
Balance, ending	0	300,000
Product Rationalization
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016		129,400,000
Restructuring Reserve [Roll Forward]
Balance, beginning	0	0
Additions (reductions) during the period		56,400,000
Payments during the period	0	0
Non-cash adjustments	0	(56,400,000)
Balance, ending	$ 0	$ 0