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Significant Accounting Policies (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period			one to three years
Share-based compensation expense	$ 0.8	$ 0.2	$ 1.3	$ 0.2
Share-based compensation tax benefit recognized	$ 0.3	$ 0.1	$ 0.5	$ 0.1

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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