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Weighted Average Common Shares (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) - shares
shares in Millions
3 Months Ended
Apr. 29, 2018
Apr. 30, 2017
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Effect of anti-dilutive securities excluded from diluted weighted average common shares 0 1