Financial Services, Financing Receivables Aging (Details 3) (USD $) In Millions	Apr. 29, 2011	Jan. 28, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 3,900	$ 3,940
1-90 Days Past due	251	346
Greater than 90 days past due	80	102
Customer receivables, gross	4,231	4,388
Revolving Loans [Member] | Small and Medium Business [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	253	246
1-90 Days Past due	20	26
Greater than 90 days past due	5	5
Customer receivables, gross	278	277
Revolving Loans [Member] | Small and Medium Business [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	32	34
1-90 Days Past due	6	9
Greater than 90 days past due	2	3
Customer receivables, gross	40	46
Revolving Loans [Member] | Consumer [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,254	1,302
1-90 Days Past due	118	153
Greater than 90 days past due	40	48
Customer receivables, gross	1,412	1,503
Revolving Loans [Member] | Consumer [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	389	447
1-90 Days Past due	58	88
Greater than 90 days past due	23	35
Customer receivables, gross	470	570
Fixed-term loans [Member] | Small and Medium Business [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	395	371
1-90 Days Past due	7	11
Greater than 90 days past due	2	3
Customer receivables, gross	404	385
Fixed-term loans [Member] | Public [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	423	463
1-90 Days Past due	17	12
Greater than 90 days past due	2	1
Customer receivables, gross	442	476
Fixed-term loans [Member] | Large Enterprise [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,154	1,077
1-90 Days Past due	25	47
Greater than 90 days past due	6	7
Customer receivables, gross	$ 1,185	$ 1,131