Net Income Per Share (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jul. 30, 2011		Jul. 31, 2010		Jul. 30, 2011		Jul. 31, 2010
Net Income Per Share
Numerator - Net income	$ 299		$ 255		$ 500		$ 449
Basic	276		307		282		307
Impact of dilutive employee stock options	2	[1]	1	[1]	2	[1]	1	[1]
Diluted	278		308		284		308
Excluded options as the impact of such options was antidilutive	8		12		10		11

[1] Excludes 8 million options for the three months ended July 30, 2011, 10 million options for the six months ended July 30, 2011, 12 million options for the three months ended July 31, 2010 and 11 million options for the six months ended July 31, 2010 as the impact of such options was antidilutive.