Borrowings (Details Textual) (USD $)	Aug. 03, 2012	Feb. 03, 2012
Short-term Debt
Estimated Fair Value of debt	$ 8,900,000,000
Short-term Secured Debt and Long-term Secured Debt, Current and Non-Current	1,400,000,000
Long-term structured financing debt	998,000,000	920,000,000
Secured Debt, Current	557,000,000
Commercial paper	1,018,000,000	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	0.26%	0.28%
Commercial paper
Short-term Debt
Short-term Debt, Weighted Average Interest Rate	0.22%	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