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Financial Services (Details Textual) (USD $)
3 Months Ended9 Months Ended
Oct. 28, 2011
year
month
Oct. 29, 2010
Oct. 28, 2011
month
Oct. 29, 2010
Jul. 29, 2011
Jan. 28, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financing provided to customers for equipment and related software and services through DFS$ 800,000,000$ 900,000,000$ 2,500,000,000$ 2,800,000,000  
Business Combination, Acquired Receivables, Gross Contractual Amount    367,000,000 
Business Combination, Acquired Receivables, Fair Value    309,000,000 
Business Combination, Acquired Receivables, Estimated Uncollectible    23,000,000 
Repayment of revolving loan transactions  12   
Duration of special programs, Minimum period  6   
Duration of special programs, Maximum period  12   
Receivables under special programs299,000,000 299,000,000  398,000,000
Duration Of Leases With Business Customers Minimum Period2     
Duration Of Leases With Business Customers Maximum Period4     
Future maturities of minimum lease payments, in Fiscal Year 2012307,000,000 307,000,000   
Future maturities of minimum lease payments, in Fiscal Year 2013985,000,000 985,000,000   
Future maturities of minimum lease payments, in Fiscal Year 2014587,000,000 587,000,000   
Future maturities of minimum lease payments, in Fiscal Year 2015194,000,000 194,000,000   
Future maturities of minimal lease payment, in Fiscal 2016 and beyond22,000,000 22,000,000   
Range of Fixed Term Loan Low3     
Range of Fixed Term Loan High4     
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance436,000,000 436,000,000   
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net228,000,000 228,000,000   
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference8,000,000 67,000,000   
Customer receivables funded via securitization through SPEs501,000,000510,000,0001,600,000,0001,500,000,000  
General terms of securitization programs12 12   
Structured financing debt related to fixed-term leases, loans and revolving loans1,300,000,000 1,300,000,000  1,000,000,000
Duration of debt, Minimum period  12   
Duration of debt, Maximum period  36   
Total debt capacity related to the loan securitization programs  1,400,000,000   
Dell Financial Services Canada [Member]
      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Property Subject to or Available for Operating Lease, Gross    $ 67,000,000