Borrowings (Details Textual) (USD $)	May 04, 2012	Feb. 03, 2012
Short-term Debt
Estimated Fair Value of debt	$ 9,500,000,000
Secured Debt	1,400,000,000
Short-term Secured Debt and Long-term Secured Debt, Current	991,000,000
Commercial paper	1,188,000,000	1,500,000,000
Line of Credit Facility, Maximum Borrowing Capacity	3,000,000,000
Commercial Paper Program	2,500,000,000
Line of Credit Facility, Amount Outstanding	0
Secured Debt
Short-term Debt
Short-term Debt, Weighted Average Interest Rate	0.25%	0.28%
Commercial paper
Short-term Debt
Short-term Debt, Weighted Average Interest Rate	0.27%	0.23%
Expires on April 2, 2013
Short-term Debt
Line of Credit Facility, Maximum Borrowing Capacity	1,000,000,000
Expires on April 15, 2015
Short-term Debt
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000,000