Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Cash flows from operating activities:
Consolidated net income	$ 11,911	$ 12,045
Income from discontinued operations, net of income taxes	(285)	(38)
Income from continuing operations	11,626	12,007
Adjustments to reconcile consoliated net income to net cash provided by operating activities:
Depreciation and amortization	6,881	6,600
Deferred income taxes	(233)	594
Other operating activities	592	465
Changes in certain assets and liabilities:
Receivables, net	459	191
Inventories	(6,929)	(6,230)
Accounts payable	3,068	2,089
Accrued liabilities	583	(95)
Accrued income taxes	(577)	(2,301)
Net cash provided by operating activities	15,470	13,320
Cash flows from investing activities:
Payments for property and equipment	(8,243)	(9,506)
Proceeds from the disposal of property and equipment	459	521
Proceeds from the disposal of certain operations	671	0
Other investing activities	(44)	(156)
Net cash used in investing activities	(7,157)	(9,141)
Cash flows from financing activities:
Net change in short-term borrowings	(1,843)	6,046
Proceeds from issuance of long-term debt	5,120	7,053
Payments of long-term debt	(3,883)	(4,943)
Dividends paid	(4,639)	(4,625)
Purchase of Company stock	(1,015)	(5,806)
Dividends paid to noncontrolling interest	(401)	(365)
Purchase of noncontrolling interest	(1,804)	(247)
Other financing activities	(393)	(149)
Net cash used in financing activities	(8,858)	(3,036)
Effect of exchange rates on cash and cash equivalents	(18)	(188)
Net increase (decrease) in cash and cash equivalents	(563)	955
Cash and cash equivalents at beginning of year	7,281	7,781
Cash and cash equivalents at end of period	$ 6,718	$ 8,736