Financial Services, Financing Receivables Aging (Details 3) (USD $) In Millions	Oct. 28, 2011	Jan. 28, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 4,100	$ 3,940
1-90 Days Past due	280	346
Greater than 90 days past due	79	102
Customer receivables, gross	4,459	4,388
Revolving Loans [Member] | Small and Medium Business [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	254	246
1-90 Days Past due	22	26
Greater than 90 days past due	5	5
Customer receivables, gross	281	277
Revolving Loans [Member] | Small and Medium Business [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	24	34
1-90 Days Past due	5	9
Greater than 90 days past due	2	3
Customer receivables, gross	31	46
Revolving Loans [Member] | Consumer [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,204	1,302
1-90 Days Past due	148	153
Greater than 90 days past due	46	48
Customer receivables, gross	1,398	1,503
Revolving Loans [Member] | Consumer [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	324	447
1-90 Days Past due	58	88
Greater than 90 days past due	19	35
Customer receivables, gross	401	570
Fixed-term loans [Member] | Small and Medium Business [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	476	371
1-90 Days Past due	11	11
Greater than 90 days past due	3	3
Customer receivables, gross	490	385
Fixed-term loans [Member] | Small and Medium Business [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	40	0
1-90 Days Past due	3	0
Greater than 90 days past due	0	0
Customer receivables, gross	43	0
Fixed-term loans [Member] | Consumer [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	19	0
1-90 Days Past due	1	0
Greater than 90 days past due	0	0
Customer receivables, gross	20	0
Fixed-term loans [Member] | Consumer [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	79	0
1-90 Days Past due	6	0
Greater than 90 days past due	1	0
Customer receivables, gross	86	0
Fixed-term loans [Member] | Public [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	408	463
1-90 Days Past due	6	12
Greater than 90 days past due	0	1
Customer receivables, gross	414	476
Fixed-term loans [Member] | Public [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	18	0
1-90 Days Past due	1	0
Greater than 90 days past due	0	0
Customer receivables, gross	19	0
Fixed-term loans [Member] | Large Enterprise [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,233	1,077
1-90 Days Past due	15	47
Greater than 90 days past due	3	7
Customer receivables, gross	1,251	1,131
Fixed-term loans [Member] | Large Enterprise [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	21	0
1-90 Days Past due	4	0
Greater than 90 days past due	0	0
Customer receivables, gross	$ 25	$ 0