Basic and Diluted Weighted Average Common Shares (Reconciliation Of Basic To Diluted Weighted Average Common Shares) (Details) In Millions, unless otherwise specified	12 Months Ended
	Jan. 29, 2012		Jan. 30, 2011		Jan. 31, 2010
Earnings Per Share [Abstract]
Weighted Average Common Shares	1,562	[1]	1,648	[1]	1,683	[1]
Effect of potentially dilutive securities: Stock plans	8		10		9
Diluted weighted average common shares	1,570	[1]	1,658	[1]	1,692	[1]

[1] Fiscal years ended January 29, 2012, January 30, 2011 and January 31, 2010 include 52 weeks.