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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating activities      
Net earnings $ 762 $ 1,084 $ 1,388
Adjustments to reconcile net earnings to net cash provided by operating activities:      
Depreciation and amortization 611 604 587
Mark-to-market pension and other postretirement benefit plans (gain) loss, net 143 99 (21)
Asset impairment charges 72 39 1
Early debt extinguishment and other related costs 0 7 0
Gains from sale of assets and businesses 0 (4) (3)
Gain from property insurance 0 (65) 0
Provision for (benefit from) deferred income taxes 23 (51) (394)
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:      
(Increase) decrease in trade receivables 170 16 (53)
(Increase) decrease in inventories (80) (224) (71)
Increase (decrease) in trade payables (27) 90 123
Pension and other postretirement contributions (in excess of) less than expenses (119) (152) (115)
Variable compensation (in excess of) less than expenses 38 55 71
Other items, net (89) 45 144
Net cash provided by operating activities 1,504 1,543 1,657
Investing activities      
Additions to properties and equipment (425) (528) (649)
Proceeds from property insurance 0 65 0
Proceeds from sale of assets and businesses 0 5 14
Acquisitions, net of cash acquired (48) (3) (4)
Other items, net (7) (2) (4)
Net cash used in investing activities (480) (463) (643)
Financing activities      
Net increase (decrease) in commercial paper and other borrowings (70) (146) (19)
Proceeds from borrowings 460 1,604 675
Repayment of borrowings (760) (1,774) (1,025)
Dividends paid to stockholders (343) (318) (296)
Treasury stock purchases (325) (400) (350)
Other items, net (5) (6) 9
Net cash used in financing activities (1,043) (1,040) (1,006)
Effect of exchange rate changes on cash and cash equivalents (3) (5) 2
Net change in cash and cash equivalents (22) 35 10
Cash and cash equivalents at beginning of period 226 191 181
Cash and cash equivalents at end of period $ 204 $ 226 $ 191