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Borrowings (Details Textual) (USD $)
Aug. 02, 2013
Feb. 01, 2013
Debt    
Short-term Secured Debt and Long-term Secured Debt, Current and Non-Current $ 1,400,000,000  
Long-term structured financing debt 943,000,000 872,000,000
Secured Debt, Current 547,000,000  
Commercial paper 32,000,000 1,807,000,000
Line of Credit Facility, Maximum Borrowing Capacity 2,000,000,000  
Line of Credit Facility, Amount Outstanding 0  
Secured Debt
   
Debt    
Short-term Debt, Weighted Average Interest Rate 1.10% 1.00%
Commercial paper
   
Debt    
Short-term Debt, Weighted Average Interest Rate 0.61% 0.38%
Senior Notes and Debentures
   
Debt    
Carrying Value of Senior Notes and Debentures 5,400,000,000 6,000,000,000
Estimated Fair Value of Senior Notes and Debentures $ 5,200,000,000 $ 5,900,000,000