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Earnings Per Share And Shareholders' Equity (Dividends) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Oct. 31, 2015
Aug. 01, 2015
May. 02, 2015
Nov. 01, 2014
Aug. 02, 2014
May. 03, 2014
Oct. 31, 2015
Nov. 01, 2014
Earnings Per Share And Shareholders' Equity [Abstract]                
Ordinary Dividends $ 0.5 $ 0.50 $ 0.5 $ 0.34 $ 0.34 $ 0.34 $ 1.5 $ 1.02
Special Dividends 0 0 2 0 0 1 2 1
Total Dividends $ 0.5 $ 0.5 $ 2.5 $ 0.34 $ 0.34 $ 1.34 $ 3.5 $ 2.02
Total Paid $ 146 $ 146 $ 734 $ 100 $ 99 $ 392 $ 1,026 $ 591