Supplemental Cash Flow Disclosure Narrative (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011
Noncash Items
Capital expenditures incurred but not yet paid	$ 7.2	$ 5.1
Increase (decrease) in accrued property plant and equipment	$ 0.5	$ 3.3