Warranty Reserves (Detail) (Warranty Reserves, USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	May 03, 2014	May 04, 2013	Feb. 01, 2014
Warranty Reserves
Product Warranty Accrual, Balance Sheet Classification [Abstract]
Warranty reserve, beginning of period:	$ 19.1	$ 18.5	$ 18.5
Warranty expense	1.7	1.6	7.4
Utilized	(1.4)	(1.5)	(6.8)
Warranty reserve, end of period	19.4	18.6	19.1
Current liabilities	6.7	6.8	6.7
Non-current liabilities	12.7	11.8	12.4
Total warranty reserve	$ 19.4	$ 18.6	$ 19.1