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Earnings Per Share And Shareholders' Equity (Dividends) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jul. 29, 2017
Apr. 29, 2017
Jul. 30, 2016
Apr. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Earnings Per Share And Shareholders' Equity [Abstract]            
Ordinary Dividends $ 0.6 $ 0.60 $ 0.6 $ 0.60 $ 1.2 $ 1.2
Special Dividends 0 0 0 2 0 2
Total Dividends $ 0.6 $ 0.6 $ 0.6 $ 2.6 $ 1.2 $ 3.2
Payments of Dividends $ 172 $ 172 $ 173 $ 750 $ 344 $ 923