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6. Earnings Per Share (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 28, 2012
Oct. 28, 2012
Jan. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years  
Restricted Stock Units, Vested, Stock Award   1  
Share-based Compensation by Share-based Payments, Unvested Restricted Stock Outstanding, Net 31,894 31,894 32,005
Stock Repurchased and Retired During Period, Shares 35,300 57,700  
Share Repurchase Authorization Plan (in Dollars)   $ 12.5