Earnings Per Share (Computation Of Basic and Diluted Earnings (Loss) Per Share) (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. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Earnings Per Share [Abstract]
Net income (loss)	$ 745	$ 139	$ 241	$ 131	$ 667	$ 10	$ 147	$ 23	$ 1,256	$ 847	$ 329
Net income (loss) available to common stockholders, basic									1,256	847	329
Net income (loss) available to common stockholders, diluted									$ 1,256	$ 847	$ 329
Basic earnings (loss) per share	$ 1.77	$ 0.33	$ 0.56	$ 0.31	$ 1.57	$ 0.02	$ 0.35	$ 0.05	$ 2.96	$ 2.00	$ 0.78
Diluted earnings (loss) per share	$ 1.74	$ 0.32	$ 0.55	$ 0.30	$ 1.55	$ 0.02	$ 0.35	$ 0.05	$ 2.92	$ 1.98	$ 0.78
Average number of shares issued, basic									423.5	422.2	420.4
Shares to be issued under deferred compensation plans									1.0	1.1	1.3
Average number of shares outstanding, basic									424.5	423.3	421.7
Effect of dilutive securities-stock options, restricted stock and restricted stock units									5.9	4.0	1.5
Average number of shares outstanding, diluted									430.4	427.3	423.2