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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 9 Months Ended
Oct. 28, 2017
Oct. 29, 2016
Oct. 28, 2017
Oct. 29, 2016
Weighted-average Common Shares:        
Issued Shares 318 315 317 314
Treasury Shares (34) (29) (32) (27)
Basic Shares 284 286 285 287
Effect of Dilutive Options and Restricted Stock 1 4 3 4
Diluted Shares 285 290 288 291
Anti-dilutive Options and Awards (a) [1] 6 2 5 2
[1] These options and awards were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.