Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2011		Oct. 31, 2010
Cash flows from operating activities:
Consolidated net income	$ 10,980	[1]	$ 10,781	[1]
Loss from discontinued operations, net of tax	36
Income from continuing operations	11,016		10,781
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	6,067		5,635
Other operating activities	1,367		851
Changes in certain assets and liabilities, net of effects of acquisitions:
Accounts receivable	499		(90)
Inventories	(7,271)		(7,996)
Accounts payable	3,331		5,363
Accrued liabilities	(2,095)		(2,279)
Net cash provided by operating activities	12,914		12,265
Cash flows from investing activities:
Payments for property and equipment	(9,543)		(9,319)
Proceeds from the disposal of property and equipment	354		242
Investments and business acquisitions, net of cash acquired	(3,537)		(132)
Other investing activities	(88)		(80)
Net cash used in investing activities	(12,814)		(9,289)
Cash flows from financing activities:
Net change in short-term borrowings	8,558		6,820
Proceeds from issuance of long-term debt	5,008		11,383
Payments of long-term debt	(4,265)		(3,577)
Dividends paid	(3,800)		(3,361)
Purchase of Company stock	(4,957)		(10,972)
Other financing activities	(828)		(623)
Net cash used in financing activities	(284)		(330)
Effect of exchange rates on cash and cash equivalents	(148)		63
Net increase (decrease) in cash and cash equivalents	(332)		2,709
Cash and cash equivalents at beginning of year	7,395		7,907
Cash and cash equivalents at end of period	$ 7,063		$ 10,616

[1] Includes $40 million and $6 million for the nine months ended October 31, 2011 and 2010, respectively, related to the redeemable noncontrolling interest.