Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Cash flows from operating activities:
Consolidated net income	$ 10,523	$ 14,293	$ 15,080
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	10,529	10,080	9,454
Deferred income taxes	(304)	761	(672)
Gain (loss) on extinguishment of debt	3,136	0	0
Other operating activities	1,210	206	1,410
Changes in certain assets and liabilities, net of effects of acquisitions:
Receivables, net	(1,074)	(402)	(19)
Inventories	(140)	1,021	(703)
Accounts payable	4,086	3,942	2,008
Accrued liabilities	928	1,280	1,466
Accrued income taxes	(557)	492	(472)
Net cash provided by operating activities	28,337	31,673	27,552
Cash flows from investing activities:
Payments for property and equipment	(10,051)	(10,619)	(11,477)
Proceeds from the disposal of property and equipment	378	456	635
Proceeds from the disposal of certain operations	1,046	662	246
Purchase of available for sale securities	0	(1,901)	0
Investment and business acquisitions, net of cash acquired	(375)	(2,463)	0
Other investing activities	(58)	(122)	(79)
Net cash used in investing activities	(9,060)	(13,987)	(10,675)
Cash flows from financing activities:
Net change in short-term borrowings	4,148	(1,673)	1,235
Proceeds from issuance of long-term debt	7,476	137	39
Payments of long-term debt	(13,061)	(2,055)	(4,432)
Payment for debt extinguishment or debt prepayment cost	(3,059)	0	0
Dividends paid	(6,124)	(6,216)	(6,294)
Purchase of Company stock	(8,296)	(8,298)	(4,112)
Dividends paid to noncontrolling interest	(690)	(479)	(719)
Purchase of noncontrolling interest	(8)	(90)	(1,326)
Other financing activities	(261)	(398)	(676)
Net cash used in financing activities	(19,875)	(19,072)	(16,285)
Effect of exchange rates on cash and cash equivalents	487	(452)	(1,022)
Net increase (decrease) in cash and cash equivalents	(111)	(1,838)	(430)
Cash and cash equivalents at beginning of year	6,867	8,705	9,135
Cash and cash equivalents at end of year	6,756	6,867	8,705
Supplemental disclosure of cash flow information:
Income taxes paid	6,179	4,507	8,111
Interest paid	$ 2,450	$ 2,351	$ 2,540