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Consolidated Cash Flow Statement - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Operating Activities    
Net income $ 575 $ 560
Depreciation and amortization 178 172
Stock-based compensation 20 15
Deferred income taxes (25) (34)
Equity companies' earnings in excess of dividends paid (26) (30)
Operating working capital (264) (105)
Postretirement benefits (21) (16)
Other (1) (9)
Cash Provided by Operations 436 553
Investing Activities    
Capital spending (215) (220)
Investments in time deposits (37) (59)
Maturities of time deposits 70 42
Other 4 8
Cash Used for Investing (178) (229)
Financing Activities    
Cash dividends paid (329) (318)
Change in short-term debt 196 (675)
Debt proceeds 0 796
Debt repayments (8) (2)
Proceeds from exercise of stock options 78 31
Acquisitions of common stock for the treasury (295) (140)
Other (9) (7)
Cash Used for Financing (367) (315)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 21 7
Change in Cash and Cash Equivalents (88) 16
Cash and Cash Equivalents - Beginning of Year 923 619
Cash and Cash Equivalents - End of Period $ 835 $ 635