Useful Lives of Major Classes of Assets (Detail)	6 Months Ended
	Jul. 30, 2011
Buildings
Property, Plant and Equipment, Estimated Useful Lives, Lease Terms [Line Items]
Useful lives in asset class	25 years
Leasehold Improvements
Property, Plant and Equipment, Estimated Useful Lives, Lease Terms [Line Items]
Useful lives in asset class	Lesser of 10 years or the term of the lease
Fixtures and equipment
Property, Plant and Equipment, Estimated Useful Lives, Lease Terms [Line Items]
Useful lives in asset class	5 years