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Financial Services, Financing Receivables (Details) (USD $)
In Millions
Oct. 28, 2011
Jul. 29, 2011
Jan. 28, 2011
Oct. 29, 2010
Jul. 30, 2010
Jan. 29, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Customer Receivables, gross$ 4,459 $ 4,388   
Allowances for losses(197)(210)(241)(257)(277)(237)
Customer receivables, net4,262 4,147   
Residual interest343 295   
Financing receivables, net4,605 4,442   
Short-term3,326 3,643   
Long-term1,279 799   
Revolving Loans [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Customer Receivables, gross2,111 2,396   
Allowances for losses(175)(189)(214)(228)(248)(224)
Customer receivables, net1,936 2,182   
Residual interest0 0   
Financing receivables, net1,936 2,182   
Short-term1,936 2,182   
Long-term0 0   
Fixed term loans [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Customer Receivables, gross2,348 1,992   
Allowances for losses(22)(21)(27)(29)(29)(13)
Customer receivables, net2,326 1,965   
Residual interest343 295   
Financing receivables, net2,669 2,260   
Short-term1,390 1,461   
Long-term$ 1,279 $ 799