Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities
Net income including noncontrolling interest	$ 606	$ 1,326
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization	382	438
Company pension and postretirement contributions	(232)	(248)
Company pension and postretirement expense	102	81
Stock-based compensation expense	159	147
Gain on sale of businesses	(24)	(29)
Deferred income taxes	(103)	(84)
Changes in assets and liabilities
Accounts receivable	(260)	(237)
Inventories	(209)	(149)
Accounts payable	(88)	(124)
Accrued income taxes (current and long-term)	212	225
Other - net	(402)	(358)
Net cash provided by operating activities	143	988
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)	(304)	(287)
Proceeds from sale of PP&E and other assets	83	1
Purchases of marketable securities and investments	(517)	(213)
Proceeds from maturities and sale of marketable securities and investments	990	351
Proceeds from sale of businesses, net of cash sold	40	53
Other - net	(11)	5
Net cash provided by (used in) investing activities	281	(90)
Cash Flows from Financing Activities
Change in short-term debt - net	1,581	(68)
Repayment of debt (maturities greater than 90 days)	(6)
Proceeds from debt (maturities greater than 90 days)	6
Purchases of treasury stock	(937)	(690)
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans	219	315
Dividends paid to shareholders	(810)	(702)
Other - net	(7)	(6)
Net cash provided by (used in) financing activities	46	(1,151)
Effect of exchange rate changes on cash and cash equivalents	(32)	28
Net increase (decrease) in cash and cash equivalents	438	(225)
Cash and cash equivalents at beginning of year	3,053	2,398
Cash and cash equivalents at end of period	$ 3,491	$ 2,173