Employee Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2011
Employee Benefits
Companies' contribution to the pension plan	$ 1.2	$ 0.8	$ 3.2	$ 2.4
Expected additional contribution in fiscal 2011					$ 2.8
Expected rate of return on plan assets for determining net periodic pension cost			9.00%