Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Cash flows from operating activities:
Consolidated net income	$ 12,045	$ 11,880
Income from discontinued operations, net of income taxes	(38)	(39)
Income from continuing operations	12,007	11,841
Adjustments to reconcile consoliated net income to net cash provided by operating activities:
Depreciation and amortization	6,600	6,304
Deferred income taxes	594	279
Other operating activities	465	138
Changes in certain assets and liabilities:
Receivables, net	191	501
Inventories	(6,230)	(6,459)
Accounts payable	2,089	3,545
Accrued liabilities	(95)	(82)
Accrued income taxes	(2,301)	(160)
Net cash provided by operating activities	13,320	15,907
Cash flows from investing activities:
Payments for property and equipment	(9,506)	(8,921)
Proceeds from the disposal of property and equipment	521	343
Investments and Business Acquisitions, Net of Cash Acquired	15	716
Other investing activities	58	(58)
Net cash used in investing activities	(8,942)	(9,352)
Cash flows from financing activities:
Net change in short-term borrowings	6,046	4,700
Proceeds from issuance of long-term debt	7,053	199
Payments of long-term debt	(4,943)	(639)
Dividends paid	(4,625)	(4,034)
Purchase of Company stock	(5,806)	(4,657)
Other financing activities	(960)	(263)
Net cash used in financing activities	(3,235)	(4,694)
Effect of exchange rates on cash and cash equivalents	(188)	232
Net increase in cash and cash equivalents	955	2,093
Cash and cash equivalents at beginning of year	7,781	6,550
Cash and cash equivalents at end of period	$ 8,736	$ 8,643