Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Cash flows from operating activities:
Consolidated net income	$ 3,283	$ 3,726
Income from discontinued operations, net of income taxes	0	(15)
Income from continuing operations	3,283	3,711
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	2,319	2,250
Deferred income taxes	(159)	26
Other operating activities	239	543
Changes in certain assets and liabilities, net of effects of acquisitions:
Receivables, net	782	613
Inventories	(1,475)	(423)
Accounts payable	(319)	(831)
Accrued liabilities	(919)	(942)
Accrued income taxes	695	992
Net cash provided by operating activities	4,446	5,939
Cash flows from investing activities:
Payments for property and equipment	(2,203)	(2,157)
Proceeds from the disposal of property and equipment	68	48
Other investing activities	22	(12)
Net cash used in investing activities	(2,113)	(2,121)
Cash flows from financing activities:
Net change in short-term borrowings	(741)	(4,129)
Proceeds from issuance of long-term debt	43	4,519
Payments of long-term debt	(915)	(1,574)
Dividends paid	(1,579)	(1,547)
Purchase of Company stock	(280)	(626)
Dividends paid to noncontrolling interest	(69)	(28)
Purchase of noncontrolling interest	(70)	(1,626)
Other financing activities	(84)	(166)
Net cash used in financing activities	(3,695)	(5,177)
Effect of exchange rates on cash and cash equivalents	(14)	90
Net increase (decrease) in cash and cash equivalents	(1,376)	(1,269)
Cash and cash equivalents at beginning of year	9,135	7,281
Cash and cash equivalents at end of period	$ 7,759	$ 6,012