Financial Services, Financing Receivables by Credit Quality Indicator (Details 4) (USD $) In Millions	Apr. 29, 2011	Jan. 28, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
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]
Best	105	108
Good	85	85
Mixed	88	84
Customer receivables, gross	278	277
Revolving Loans [Member] | Small and Medium Business [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	14	16
Good	21	24
Mixed	5	6
Customer receivables, gross	40	46
Fixed-term loans [Member] | Small and Medium Business [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	40	62
Good	128	129
Mixed	236	194
Customer receivables, gross	404	385
Fixed-term loans [Member] | Large Enterprise [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	874	806
Good	189	166
Mixed	122	159
Customer receivables, gross	1,185	1,131
Revolving Loans [Member] | Consumer [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	229	251
Good	397	415
Mixed	786	837
Customer receivables, gross	1,412	1,503
Revolving Loans [Member] | Consumer [Member] | Purchased [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	43	50
Good	108	127
Mixed	319	393
Customer receivables, gross	470	570
Fixed-term loans [Member] | Public [Member] | Owned Since Inception [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Best	402	438
Good	32	30
Mixed	8	8
Customer receivables, gross	$ 442	$ 476