Customer Accounts Receivable Aging (Detail)	Jul. 30, 2011	Jan. 29, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	90.70%	90.40%
Up to 60 days past due	7.70%	8.10%
61-120 days past due	1.00%	1.00%
121-180 days past due	0.60%	0.50%