Share-Based Compensation Plans (Schedule Of Compensation Expense And Related Income Tax Benefit For Share-Based Awards) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 4.9	$ 3.8	$ 12.7	$ 9.2
Related income tax benefit	1.5	1.1	4.0	2.8
Selling, General And Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	4.2	3.2	10.7	7.9
Cost Of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0.2	0.2	0.7	0.5
Research And Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0.3	0.2	0.6	0.3
Capitalized In Inventory [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.2	$ 0.2	$ 0.7	$ 0.5