Income Taxes (Components Of Earnings From Continuing Operations Before Provision For Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 29, 2012		Jan. 30, 2011		Jan. 31, 2010
Income Tax Disclosure [Abstract]
United States	$ 5,508		$ 4,854		$ 3,586
Foreign	560		419		396
Total	$ 6,068	[1]	$ 5,273	[1]	$ 3,982	[1]

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