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Earnings Per Share And Shareholders' Equity (Shares Utilized for the Calculation of Basic and Diluted Earnings per Share) (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Weighted-average Common Shares:        
Issued Shares 318 314 317 314
Treasury Shares (31) (27) (31) (27)
Basic Shares 287 287 286 287
Effect of Dilutive Options and Restricted Stock 2 4 3 5
Diluted Shares 289 291 289 292
Anti-dilutive Options and Awards (a) [1] 4 3 4 2
[1] These options and awards were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.