Change in Accounting Method (Details) (USD $)	3 Months Ended	9 Months Ended
	Oct. 30, 2011	Oct. 30, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decreased cost of sales and increased/decreased gross margin	$ 0.1	$ 2.2
Increase in inventory value	$ 2.2	$ 2.2