Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income including noncontrolling interest	$ 4,998	$ 4,721	$ 4,511
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization	1,408	1,371	1,288
Company pension and postretirement contributions	(215)	(482)	(1,146)
Company pension and postretirement expense	391	553	650
Stock-based compensation expense	280	240	223
Deferred income taxes	(146)	(167)	33
Excess tax benefits from stock-based compensation	(167)	(92)	(62)
Changes in assets and liabilities
Accounts receivable	(268)	(337)	(133)
Inventories	(113)	(86)	(251)
Accounts payable	75	16	72
Accrued income taxes (current and long-term)	206	206	90
Other - net	177	(126)	25
Net cash provided by operating activities	6,626	5,817	5,300
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)	(1,493)	(1,665)	(1,484)
Proceeds from sale of PP&E and other assets	135	128	41
Acquisitions, net of cash acquired	(94)	0	(1,046)
Purchases of marketable securities and investments	(1,280)	(4,040)	(5,492)
Proceeds from maturities and sale of marketable securities and investments	2,034	4,667	5,281
Proceeds from sale of businesses	0	8	0
Other investing	102	46	14
Net cash used in investing activities	(596)	(856)	(2,686)
Cash Flows from Financing Activities
Change in short-term debt - net	27	(2)	(36)
Repayment of debt (maturities greater than 90 days)	(1,625)	(859)	(612)
Proceeds from debt (maturities greater than 90 days)	2,608	824	1,370
Purchases of treasury stock	(5,652)	(5,212)	(2,204)
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans	968	1,609	1,012
Dividends paid to shareholders	(2,216)	(1,730)	(1,635)
Excess tax benefits from stock-based compensation	167	92	62
Purchase of noncontrolling interest	(861)	0	0
Other - net	(19)	32	(15)
Net cash used in financing activities	(6,603)	(5,246)	(2,058)
Effect of exchange rate changes on cash and cash equivalents	(111)	(17)	108
Net increase (decrease) in cash and cash equivalents	(684)	(302)	664
Cash and cash equivalents at beginning of year	2,581	2,883	2,219
Cash and cash equivalents at end of period	$ 1,897	$ 2,581	$ 2,883