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Earnings Per Share and Shareholders' Equity (Shares Utilized for the Calculation of Basic and Diluted Earnings per Share) (Details)
In Millions
3 Months Ended
Apr. 30, 2011
May 01, 2010
Weighted-average Common Shares:    
Issued Shares 330 323
Treasury Shares (13) 0
Basic Shares 317 323
Effect of Dilutive Options and Restricted Stock 11 10
Diluted Shares 328 333
Anti-dilutive Options and Awards 2 [1] 3 [1]
[1] These options and awards were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.