Shareholders' Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 28, 2012	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010	Jan. 31, 2009
Stockholders' Equity Note [Abstract]
Preferred stock, shares authorized	125,000,000	125,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued	0	0
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	487,338,500	487,338,500	495,038,500	495,038,500	495,038,500
Common stock, shares outstanding	414,181,000	414,181,000	423,341,300	420,843,200	420,083,800
Retirement of common stock		(7,700,000)
Stock repurchase program, additional amount authorized	$ 1,000
Stock repurchase program authorized amount		10,500
Stock repurchased during period, shares		16,356,500
Stock repurchased during period, value		500
Stock repurchase program remaining authorized repurchase amount		$ 1,352