Shareholders' Equity (Dividends Paid) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Jan. 28, 2012	Oct. 29, 2011	Jul. 30, 2011	Apr. 30, 2011	Jan. 29, 2011	Oct. 30, 2010	Jul. 31, 2010	May 01, 2010	Jan. 30, 2010	Oct. 31, 2009	Aug. 01, 2009	May 02, 2009	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Common Stock, Dividends, Per Share, Cash Paid	$ 0.2	$ 0.2	$ 0.2	$ 0.2	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.8	$ 0.6	$ 0.6
Special Dividend To Common Stockholders Per Share Paid	$ 2	$ 0	$ 1	$ 0	$ 3	$ 0	$ 0	$ 1	$ 0	$ 0	$ 0	$ 0	$ 3	$ 4	$ 0
Total Dividends Per Share Cash Paid	$ 2.2	$ 0.2	$ 1.2	$ 0.2	$ 3.15	$ 0.15	$ 0.15	$ 1.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 3.8	$ 4.6	$ 0.6
Payments of Dividends, Common Stock	$ 653	$ 60	$ 367	$ 64	$ 1,017	$ 49	$ 49	$ 373	$ 49	$ 48	$ 48	$ 48	$ 1,144	$ 1,488	$ 193