Financial Services, Financing Receivables by Credit Quality Indicator (Details 4) (USD $) In Millions	Oct. 28, 2011	Jan. 28, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
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]
Best	101	108
Good	83	85
Mixed	97	84
Customer receivables, gross	281	277
Revolving Loans [Member] | Small and Medium Business [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	11	16
Good	16	24
Mixed	4	6
Customer receivables, gross	31	46
Fixed-term loans [Member] | Small and Medium Business [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	49	55
Good	173	122
Mixed	268	208
Customer receivables, gross	490	385
Fixed-term loans [Member] | Small and Medium Business [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	4	0
Good	34	0
Mixed	5	0
Customer receivables, gross	43	0
Fixed-term loans [Member] | Large Enterprise [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	968	806
Good	183	166
Mixed	100	159
Customer receivables, gross	1,251	1,131
Fixed-term loans [Member] | Large Enterprise [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	11	0
Good	10	0
Mixed	4	0
Customer receivables, gross	25	0
Revolving Loans [Member] | Consumer [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	201	251
Good	407	415
Mixed	790	837
Customer receivables, gross	1,398	1,503
Revolving Loans [Member] | Consumer [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	33	50
Good	95	127
Mixed	273	393
Customer receivables, gross	401	570
Fixed-term loans [Member] | Consumer [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	1	0
Good	9	0
Mixed	10	0
Customer receivables, gross	20	0
Fixed-term loans [Member] | Consumer [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	5	0
Good	40	0
Mixed	41	0
Customer receivables, gross	86	0
Fixed-term loans [Member] | Public [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	371	438
Good	34	30
Mixed	9	8
Customer receivables, gross	414	476
Fixed-term loans [Member] | Public [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	15	0
Good	3	0
Mixed	1	0
Customer receivables, gross	$ 19	$ 0