Goodwill and Other Intangible Assets (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Apr. 28, 2012	Apr. 30, 2011	Jan. 28, 2012
Goodwill and Intangible Assets
Pretax amortization expense associated with intangible assets	$ 0.8	$ 0.9	$ 3.4
Pretax amortization expense associated with intangible assets, 2012	2.4
Pretax amortization expense associated with intangible assets, 2013	3.2
Pretax amortization expense associated with intangible assets, 2014	3.1
Pretax amortization expense associated with intangible assets, 2015	3.1
Pretax amortization expense associated with intangible assets, 2016	$ 3.1