Borrowings (Details) (USD $)	9 Months Ended
	Oct. 28, 2011	Jan. 28, 2011	Oct. 28, 2011 Notes Payable, Other Payables [Member]	Oct. 28, 2011 Commercial Paper [Member]	Oct. 28, 2011 Expires on April 2, 2013	Oct. 28, 2011 Expired on June 1, 2011	Oct. 28, 2011 Expires on April 15, 2015	Oct. 28, 2011 2012 Notes	Jan. 28, 2011 2012 Notes	Jun. 10, 2009 2012 Notes	Oct. 28, 2011 2013A Notes	Jan. 28, 2011 2013A Notes	Apr. 17, 2008 2013A Notes	Oct. 28, 2011 2013B Notes	Jan. 28, 2011 2013B Notes	Sep. 07, 2010 2013B Notes	Oct. 28, 2011 2014A Notes	Jan. 28, 2011 2014A Notes	Apr. 01, 2009 2014A Notes	Oct. 28, 2011 2014B Notes	Mar. 28, 2011 2014B Notes	Jan. 28, 2011 2014B Notes	Oct. 28, 2011 2014C Notes	Mar. 28, 2011 2014C Notes	Jan. 28, 2011 2014C Notes	Oct. 28, 2011 2015 Notes	Jan. 28, 2011 2015 Notes	Sep. 07, 2010 2015 Notes	Oct. 28, 2011 2016 Notes	Mar. 28, 2011 2016 Notes	Jan. 28, 2011 2016 Notes	Oct. 28, 2011 2018 Notes	Jan. 28, 2011 2018 Notes	Apr. 17, 2008 2018 Notes	Oct. 28, 2011 2019 Notes	Jan. 28, 2011 2019 Notes	Jun. 10, 2009 2019 Notes	Oct. 28, 2011 2021 Notes	Mar. 28, 2011 2021 Notes	Jan. 28, 2011 2021 Notes	Oct. 28, 2011 2038 Notes	Jan. 28, 2011 2038 Notes	Apr. 17, 2008 2038 Notes	Oct. 28, 2011 2040 Notes	Jan. 28, 2011 2040 Notes	Sep. 07, 2010 2040 Notes	Oct. 28, 2011 2028 Notes	Jan. 28, 2011 2028 Notes	Apr. 03, 1998 2028 Notes
Debt Instrument [Line Items]
Long-term Debt								$ 400,000,000	$ 400,000,000		$ 606,000,000	$ 609,000,000		$ 500,000,000	$ 499,000,000		$ 500,000,000	$ 500,000,000		$ 300,000,000		$ 0	$ 400,000,000		$ 0	$ 700,000,000	$ 700,000,000		$ 399,000,000		$ 0	$ 498,000,000	$ 499,000,000		$ 600,000,000	$ 600,000,000		$ 398,000,000		$ 0	$ 400,000,000	$ 400,000,000		$ 300,000,000	$ 300,000,000		$ 385,000,000	$ 389,000,000
Secured Debt	1,372,000,000	1,100,000,000
Notes and Loans Payable, Current	1,328,000,000	850,000,000
Long-term Debt, Excluding Current Maturities	6,430,000,000	5,146,000,000
Other	3,000,000	1,000,000
Commercial Paper	500,000,000	0
Short-term debt	1,831,000,000	851,000,000
Total debt	8,261,000,000	5,997,000,000
Notes Issued, Long-term debt										400,000,000			600,000,000			500,000,000			500,000,000		300,000,000			400,000,000				700,000,000		400,000,000				500,000,000			600,000,000		400,000,000				400,000,000			300,000,000			300,000,000
Stated interest rate for each instrument										3.375%			4.70%			1.40%			5.625%					2.10%				2.30%		3.10%				5.65%			5.875%		4.625%				6.50%			5.40%			7.10%
Borrowings Textuals [Abstract]
Net proceeds from Issued Notes	1,500,000,000
Estimated Fair Value of debt	8,200,000,000
Short-term Debt, Weighted Average Interest Rate			1.40%	0.33%
Secured Debt	1,372,000,000	1,100,000,000
Structured financing debt related to fixed-term leases, loans and revolving loans	1,300,000,000	1,000,000,000
Secured Debt, Current	928,000,000
Commercial Paper Program	2,000,000,000
Line of Credit Facility, Maximum Borrowing Capacity	3,000,000,000				1,000,000,000	1,000,000,000	2,000,000,000
Line of Credit Facility, Amount Outstanding	$ 0