Debt (Narrative) (Details) (USD $)	12 Months Ended														0 Months Ended		0 Months Ended		1 Months Ended						1 Months Ended
	Jan. 29, 2012		Jan. 30, 2011		Jan. 31, 2010		Jan. 29, 2012 5.40% Senior Notes due March 1, 2016 [Member]	Mar. 31, 2011 5.40% Senior Notes due March 1, 2016 [Member]	Jan. 29, 2012 4.40% Senior Notes due April 1, 2021 [Member]	Mar. 31, 2011 4.40% Senior Notes due April 1, 2021 [Member]	Jan. 29, 2012 5.95% Senior Notes due April 1, 2041 [Member]	Mar. 31, 2011 5.95% Senior Notes due April 1, 2041 [Member]	Jan. 29, 2012 3.95% Senior Notes due September 15, 2020 [Member]	Sep. 30, 2010 3.95% Senior Notes due September 15, 2020 [Member]	Aug. 15, 2010 4.625% Senior Notes due August 15, 2010 [Member]	Jan. 29, 2012 4.625% Senior Notes due August 15, 2010 [Member]	Mar. 02, 2011 5.20% Senior Notes due March 1, 2011 [Member]	Jan. 29, 2012 5.20% Senior Notes due March 1, 2011 [Member]	Mar. 31, 2011 March 2011 Issuance [Member]	May 31, 2010 Forward Starting for March 2011 Issuance [Member]	Jan. 29, 2012 5.25% Senior Notes due December 16, 2013 [Member]	Jan. 29, 2012 5.40% Senior Notes due September 15, 2040 [Member]	Sep. 30, 2010 5.40% Senior Notes due September 15, 2040 [Member]	Jan. 29, 2012 5.875% Senior Notes due December 16, 2036 [Member]	Sep. 30, 2010 September 2010 Issuance [Member]	Sep. 30, 2010 Forward Starting for September 2010 Issuance [Member]	Mar. 31, 2012 Accelerated Share Repurchase Agreement [Member]	Mar. 31, 2011 Accelerated Share Repurchase Agreement [Member]
Debt Instrument [Line Items]
Notional Amount of Interest Rate Derivatives								$ 500,000,000												$ 500,000,000	$ 1,250,000,000					$ 1,000,000,000
Stated interest rate percentage							5.40%	5.40%	4.40%	4.40%	5.95%	5.95%	3.95%	3.95%		4.625%		5.20%			5.25%	5.40%	5.40%	5.875%
Derivative, Basis Spread on Variable Rate								3.00%													2.59%
Fair value of derivative agreements, asset							39,000,000														52,000,000
Senior Notes										1,000,000,000		1,000,000,000		500,000,000							1,250,000,000		500,000,000
Debt Discount										2,000,000		4,000,000		1,000,000					6,000,000				1,000,000		2,000,000
Cash paid for repurchase of common stock	3,470,000,000	[1]	2,608,000,000	[1]	213,000,000	[1]																					1,000,000,000	1,000,000,000
Extinguishment of Debt, Amount															1,000,000,000		1,000,000,000
Debt Issuance Costs																			15,000,000						8,000,000
Payment (Receipt) to Settle Forward Starting Interest Rate Swap Agreements																										193,000,000
Long-term debt, redemption price	100.00%
Debt holder, change of control redemption percentage	101.00%
Cross currency swap	390,000,000
Amount by which the fair value of cross currency swap agreements was a liability	27,000,000
Interest capitalized	3,000,000		3,000,000		4,000,000
Maturities of Long-Term Debt for next twelve months	30,000,000
Maturities of Long-Term Debt for year 2	1,300,000,000
Maturities of Long-Term Debt for year 3	30,000,000
Maturities of Long-Term Debt for year 4	27,000,000
Maturities of Long-Term Debt for year 5	3,100,000,000
Maturities of Long-Term Debt for fiscal years thereafter	$ 6,300,000,000

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