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Taxes (Deferred Tax Balance Sheet Classification) (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2014	Jan. 31, 2013
Taxes (Deferred Tax Balance Sheet Classification) [Abstract]
Deferred Taxes On Prepaid Expenses And Other	$ 822	$ 520
Deferred Taxes On Other Assets And Deferred Charges	1,151	757
Deferred Tax Assets, Net of Valuation Allowance, Current	1,973	1,277
Deferred Taxes On Accrued Liabilities	176	116
Deferred Income Taxes And Other	5,110	4,373
Liability Subtotals	5,286	4,489
Net Deferred Tax Liabilities	$ 3,313	$ 3,212

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed within one year or operating cycle, if longer.

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