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Share Based Compensation (Stock Option Assumptions) (Details) (USD $)
12 Months Ended
Jan. 28, 2012
Jan. 30, 2010
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grant Date Fair Value of Stock Options   $ 22.87
Exercise price $ 60.16 $ 22.87
Granted, Weighted-Average Grant Date Fair Value $ 54.44 $ 8.26
Assumptions:    
Price volatility   50.00%
Expected term (Years)   4.1
Risk-free interest rate   1.60%
Dividend yield   1.70%