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Share-Based Payment Award, Stock Options, Valuation Assumptions (Detail) (USD $)
12 Months Ended
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Saving Share Plans
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share price $ 49.89 [1] $ 40.09 [1] $ 33.17 [1]
Exercise price $ 41.17 [1] $ 28.32 [1] $ 26.49 [1]
Risk free interest rate 0.40% 0.70% 0.80%
Expected life of options 2 years 8 months 12 days 3 years 2 years 10 months 24 days
Expected volatility 41.00% 43.00% 49.00%
Dividend yield 1.40% 1.00% 1.60%
Fair value $ 15.40 [1] $ 11.55 [1] $ 9.80 [1]
Omnibus Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share price $ 47.15 [1] $ 44.33 [1] $ 35.18 [1]
Expected life of options 2 years 10 months 24 days 2 years 10 months 24 days 2 years 10 months 24 days
Dividend yield 1.20% 0.70% 0.70%
Fair value $ 46.12 [1] $ 43.52 [1] $ 36.80 [1]
[1] Weighted average.