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Warranty Reserves (Detail) (Warranty Reserves, USD $) In Millions, unless otherwise specified	Aug. 03, 2013	May 04, 2013	Feb. 02, 2013	Jul. 28, 2012	Apr. 28, 2012	Jan. 28, 2012
Warranty Reserves
Warranty Reserve [Line Items]
Current liabilities	$ 6.6		$ 6.9	$ 6.7
Non-current liabilities	12.0		11.6	10.9
Total warranty reserve	$ 18.6	$ 18.6	$ 18.5	$ 17.6	$ 15.1	$ 15.1

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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