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Stock Option Awards (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Stock Option Awards
Total share-based compensation expense	$ 5.0	$ 5.1	$ 6.0
Income tax benefit recognized in net income	$ 1.8	$ 1.9	$ 2.2

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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