CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income	$ 1,098	$ 951
Adjustments to reconcile to net cash provided by operating activities
Depreciation and amortization	457	453
Deferred income taxes	(109)	(105)
Pension and other postretirement benefits expense	82	104
Contributions to pension plans	(72)	(160)
Contributions to other postretirement benefits plans	(12)	(11)
Changes in working capital	(482)	(381)
Other - net	(124)	186
Net cash provided by operating activities	838	1,037
Investing activities
Capital expenditures for property, plant and equipment	(280)	(246)
Sales (purchases) of short-term investments - net	284	(309)
Other - net	(41)	(31)
Net cash used in investing activities	(37)	(586)
Financing activities
Proceeds from borrowings	500	832
Payments on borrowings	(486)	(543)
Cash dividends paid	(578)	(537)
Exercise of employee stock options	21	49
Repurchase of shares	(600)	(465)
Employee taxes paid from shares withheld	(23)	(21)
Other - net	(2)	(4)
Net cash provided by (used in) financing activities	(1,168)	(689)
Effect of currency on cash	62	7
Total decrease in cash	(305)	(231)
Cash at the beginning of the period	561	543
Cash at the end of the period	$ 256	$ 312