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Stock-Based Compensation (Summary Of Performance Share Unit Activity) (Details) - Performance share units [Member]
shares in Millions
12 Months Ended
Jan. 28, 2017
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, beginning of year (in shares or units) 0.3
Granted (in shares or units) 0.1
Vested (in shares or units) (0.1)
Forfeited or cancelled (in shares or units) (0.1)
Outstanding, end of year (in shares or units) 0.2