Restructuring and Integration Costs Restructuring and Integration Costs (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2015	Oct. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Completion Date		Jan. 31, 2016
Sauflon [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 62.0	$ 62.0
Additions during the period		9.7	36.1
Integration Costs	8.0	14.1	2.8
Sauflon [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	22.0	22.0
Additions during the period		(4.2)	20.3
Sauflon [Member] | Employee Severance [Member] | Selling, general and administrative expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	(4.5)		19.7
Sauflon [Member] | Employee Severance [Member] | Research and development expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	0.2	0.3	0.6
Sauflon [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period		0	0.5
Sauflon [Member] | Facility Closing [Member] | Selling, general and administrative expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period			0.5
Sauflon [Member] | Product Rationalization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40.0	40.0
Additions during the period		13.9	15.3
Sauflon [Member] | Product Rationalization [Member] | Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	$ 5.2	$ 13.9	$ 15.3