Earnings Per Share And Shareholders' Equity (Dividends) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Oct. 29, 2016	Oct. 31, 2015
Earnings Per Share And Shareholders' Equity [Abstract]
Ordinary Dividends	$ 0.60	$ 0.60	$ 0.60	$ 0.50	$ 0.50	$ 0.5	$ 1.8	$ 1.5
Special Dividends	0	0	2	0	0	2	2	2
Total Dividends	$ 0.6	$ 0.6	$ 2.6	$ 0.5	$ 0.5	$ 2.5	$ 3.8	$ 3.5
Total Paid	$ 173	$ 173	$ 750	$ 146	$ 146	$ 734	$ 1,096	$ 1,026