Financial Services, Allowances for Losses (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 04, 2012	Apr. 29, 2011
Financing Receivable, Allowance for Credit Losses
Balance at beginning of period	$ 202	$ 241
Recoveries	13	20
Provision charged to income statement	37	27
Balance at end of period	192	217
Principal
Financing Receivable, Allowance for Credit Losses
Charge-offs	(51)	(60)
Interest
Financing Receivable, Allowance for Credit Losses
Charge-offs	(9)	(11)
Revolving Loans
Financing Receivable, Allowance for Credit Losses
Balance at beginning of period	179	214
Recoveries	12	19
Provision charged to income statement	36	27
Balance at end of period	169	191
Revolving Loans | Principal
Financing Receivable, Allowance for Credit Losses
Charge-offs	(49)	(58)
Revolving Loans | Interest
Financing Receivable, Allowance for Credit Losses
Charge-offs	(9)	(11)
Fixed-term loans
Financing Receivable, Allowance for Credit Losses
Balance at beginning of period	23	27
Recoveries	1	1
Provision charged to income statement	1	0
Balance at end of period	23	26
Fixed-term loans | Principal
Financing Receivable, Allowance for Credit Losses
Charge-offs	(2)	(2)
Fixed-term loans | Interest
Financing Receivable, Allowance for Credit Losses
Charge-offs	$ 0	$ 0