Impact of Derivative Instruments on Condensed Consolidated Financial Statements (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in OCI on Derivatives	$ 0.2
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Loss Reclassified from AOCI into (Loss) Earnings	$ (1.1)	$ (0.9)	$ (2.7)