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Consolidated Cash Flow Statement - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating Activities      
Net income $ 2,319 $ 2,219 $ 1,066
Depreciation and amortization 724 705 746
Stock-based compensation 76 77 75
Deferred income taxes (69) (15) (255)
Equity companies' earnings (in excess of) less than dividends paid 26 (4) (10)
Operating working capital (148) 334 (445)
Postretirement benefits 2 (50) 930
Adjustments related to Venezuelan operations 0 (11) 153
Other (1) (23) 46
Cash Provided by Operations 2,929 3,232 2,306
Investing Activities      
Capital spending (785) (771) (1,056)
Investments in time deposits (214) (221) (146)
Maturities of time deposits 183 188 164
Other (35) 72 (12)
Cash Used for Investing (851) (732) (1,050)
Financing Activities      
Cash dividends paid (1,359) (1,311) (1,272)
Change in short-term debt 360 (908) 303
Debt proceeds 937 1,293 1,100
Debt repayments (1,481) (598) (553)
Proceeds from exercise of stock options 121 107 140
Acquisitions of common stock for the treasury (911) (739) (861)
Shares purchased from noncontrolling interest 0 0 (151)
Other (88) (29) (4)
Cash Used for Financing (2,421) (2,185) (1,298)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 36 (11) (128)
Change in Cash and Cash Equivalents (307) 304 (170)
Cash and Cash Equivalents - Beginning of Year 923 619 789
Cash and Cash Equivalents - End of Year $ 616 $ 923 $ 619