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Stock-Based Compensation (Stock-Based Compensation Expense Before Income Tax Benefit) (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense, before income tax benefit $ 91 $ 70 $ 68
Cost of sales and related buying and occupancy costs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense, before income tax benefit 25 20 17
Selling, general and administrative expenses [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense, before income tax benefit $ 66 $ 50 $ 51