Restructuring and Integration Costs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Oct. 31, 2015	Oct. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, completion date	Oct. 31, 2016
Sauflon [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 112.0
Additions during the period	10.8		$ 55.6	$ 36.1
Integration costs	7.9	$ 5.9
Sauflon [Member] | Product Rationalization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	89.0
Additions during the period	10.5		57.7	15.3
Sauflon [Member] | Product Rationalization [Member] | Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	10.5	8.7
Sauflon [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	19.0
Additions during the period	0.0		(2.5)	20.3
Sauflon [Member] | Employee Severance [Member] | Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	(0.2)
Sauflon [Member] | Employee Severance [Member] | Selling, general and administrative expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	0.1
Sauflon [Member] | Employee Severance [Member] | Research and development expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	0.1	$ 0.1
Sauflon [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	4.0
Additions during the period	0.3		$ 0.4	$ 0.5
Sauflon [Member] | Facility Closing [Member] | Selling, general and administrative expense [Member]
Restructuring Cost and Reserve [Line Items]
Additions during the period	$ 0.3