Restructuring and Integration Costs (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2016	Oct. 31, 2016	Jul. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Completion Date			Oct. 31, 2016
Sauflon [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016			$ 148,300,000	$ 0
Additions during the period			56,600,000
Integration costs	$ 10,000,000
Sauflon [Member] | Product Rationalization
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016			129,400,000
Additions during the period			56,400,000
Sauflon [Member] | Product Rationalization | Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	8,700,000	$ 23,500,000
Sauflon [Member] | Employee-related
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016			17,800,000
Additions during the period			0
Sauflon [Member] | Employee-related | Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	$ 400,000	900,000
Sauflon [Member] | Employee-related | Selling, general and administrative expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period		100,000
Sauflon [Member] | Employee-related | Research and development expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period		100,000
Sauflon [Member] | Facilities-related
Restructuring Cost and Reserve [Line Items]
Cumulative amounts incurred as of October 31, 2016			1,100,000
Additions during the period			$ 200,000
Sauflon [Member] | Facilities-related | Selling, general and administrative expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period		$ 200,000