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CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Cash flows from operating activities:      
Net income (loss) $ 2,177 $ (1,513) $ (1,627)
Adjustments to reconcile net income (loss) to cash provided by operating activities:      
Impairments and other charges 356 3,764 3,820
Gain on sale of WesternGeco marine seismic acquisition business (215)    
Depreciation and amortization [1] 3,556 3,837 4,094
Pension and other postretirement benefits expense 30 104 187
Stock-based compensation expense 345 343 267
Pension and other postretirement benefits funding (83) (133) (174)
Earnings of equity method investments, less dividends received (48) (56) (60)
Change in assets and liabilities:      
Decrease (increase) in receivables [2] 430 (124) 1,098
(Increase) decrease in inventories [2] (10) 108 800
Decrease (increase) in other current assets [2] 121 (174) 308
(Increase) decrease in other assets [2] (58) 402 (488)
Decrease in accounts payable and accrued liabilities [2] (824) (737) (1,680)
(Decrease) increase in estimated liability for taxes on income [2] (159) 104 (110)
Increase (decrease) in other liabilities [2] 69 (28) 77
Other [2] 26 (234) (251)
NET CASH PROVIDED BY OPERATING ACTIVITIES 5,713 5,663 6,261
Cash flows from investing activities:      
Capital expenditures (2,160) (2,107) (2,055)
SPM investments (981) (1,609) (1,031)
Multiclient seismic data capitalized (100) (276) (630)
Business acquisitions and investments, net of cash acquired (292) (847) (2,398)
Proceeds from sale of WesternGeco marine seismic business, net of cash divested 579    
Sale of investments, net 1,943 3,277 5,544
Other (29) (217) (54)
NET CASH USED IN INVESTING ACTIVITIES (1,040) (1,779) (624)
Cash flows from financing activities:      
Dividends paid (2,770) (2,778) (2,647)
Proceeds from employee stock purchase plan 227 212 231
Proceeds from exercise of stock options 34 85 184
Stock repurchase program (400) (969) (778)
Proceeds from issuance of long-term debt 898 2,371 3,640
Repayment of long-term debt (2,861) (2,961) (5,630)
Net decrease in short-term borrowings (85) (1,022) (387)
Other (63) 29 (41)
NET CASH USED IN FINANCING ACTIVITIES (5,020) (5,033) (5,428)
Net (decrease) increase in cash before translation effect (347) (1,149) 209
Translation effect on cash (19) 19 (73)
Cash, beginning of period 1,799 2,929 2,793
Cash, end of period $ 1,433 $ 1,799 $ 2,929
[1] Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.
[2] Net of the effect of business acquisitions and divestitures.