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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Operating activities    
Net income $ 2,347 $ 1,417
Adjustments to reconcile to net cash provided by operating activities    
Depreciation and amortization 685 700
Deferred income taxes (181) (105)
Pension and other postretirement benefits expense 161 177
Contributions to pension plans (447) (114)
Contributions to other postretirement benefits plans (14) (26)
After-tax gain on sale of consolidated subsidiary and remaining investment in joint venture (843) 0
Changes in working capital (144) (206)
Other - net 223 89
Net cash provided by operating activities 1,787 1,932
Investing activities    
Capital expenditures for property, plant and equipment (351) (346)
Proceeds from sale of consolidated subsidiary 600 0
Cash received from acquisitions of businesses, net of cash acquired 0 1
Purchases of short-term investments - net (621) (29)
Other - net (63) 3
Net cash used in investing activities (435) (371)
Financing activities    
Proceeds from borrowings 1,000 633
Payments on borrowings (553) (666)
Cash dividends paid (803) (780)
Exercise of employee stock options 59 60
Repurchase of shares (789) (567)
Payments Related to Tax Withholding for Share-based Compensation (21) (18)
Other - net (8) (5)
Net cash used in financing activities (1,115) (1,343)
Effect of currency on cash 11 8
Total increase in cash 248 226
Cash at the beginning of the period 543 268
Cash at the end of the period $ 791 $ 494