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Share-Based Compensation (Tables)
3 Months Ended
Apr. 30, 2011
Share-Based Compensation  
Total Share-Based Compensation Expense
                 
     13 Weeks Ended  
($ in millions)    April 30,
2011
    May 1,
2010
 

Stock units

   $ 12      $ 22   

Stock options

     4        4   

Employee stock purchase plan

     1        1   
                  

Share-based compensation expense

     17        27   

Less: Income tax benefit

     (6     (10
                  

Share-based compensation expense, net of tax

   $ 11      $ 17