Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities
Net income including noncontrolling interest	$ 4,014	$ 4,344
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization	1,117	1,195
Company pension and postretirement contributions	(303)	(314)
Company pension and postretirement expense	306	243
Stock-based compensation expense	258	266
Gain on sale of businesses	(530)	(490)
Deferred income taxes	(73)	(105)
Changes in assets and liabilities
Accounts receivable	(596)	(595)
Inventories	(562)	(436)
Accounts payable	148	(25)
Accrued income taxes (current and long-term)	122	249
Other - net	280	48
Net cash provided by operating activities	4,181	4,380
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)	(1,046)	(914)
Proceeds from sale of PP&E and other assets	143	18
Acquisitions, net of cash acquired	13	(12)
Purchases of marketable securities and investments	(1,352)	(1,055)
Proceeds from maturities and sale of marketable securities and investments	2,066	745
Proceeds from sale of businesses, net of cash sold	806	862
Other - net	8	2
Net cash provided by (used in) investing activities	638	(354)
Cash Flows from Financing Activities
Change in short-term debt - net	(698)	60
Repayment of debt (maturities greater than 90 days)	(456)	(650)
Proceeds from debt (maturities greater than 90 days)	2,247
Purchases of treasury stock	(3,601)	(1,564)
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans	401	582
Dividends paid to shareholders	(2,406)	(2,104)
Other - net	(36)	(23)
Net cash used in financing activities	(4,549)	(3,699)
Effect of exchange rate changes on cash and cash equivalents	(138)	106
Net increase (decrease) in cash and cash equivalents	132	433
Cash and cash equivalents at beginning of year	3,053	2,398
Cash and cash equivalents at end of period	$ 3,185	$ 2,831