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CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash flows from (used in) operating activities [abstract]      
Income / (loss) before tax $ 9,292 $ 18,874 $ 13,420
Depreciation, amortisation and net impairment losses 13,204 9,249 8,644
Exploration expenditures written off 777 357 (8)
(Gains) losses on foreign currency transactions and balances (224) 166 (127)
(Gains) losses on sales of assets and businesses (1,187) (648) 395
(Increase) decrease in other items related to operating activities 1,016 (526) (884)
(Increase) decrease in net derivative financial instruments (595) 409 19
Interest received 215 176 148
Interest paid (723) (441) (622)
Cash flows provided by operating activities before taxes paid and working capital items 21,776 27,615 20,985
Taxes paid (8,286) (9,010) (5,766)
(Increase) decrease in working capital 259 1,090 (417)
Cash flows provided by operating activities 13,749 19,694 14,802
Cash flows from (used in) investing activities [abstract]      
Cash used in business combinations (2,274) (3,557) 0
Capital expenditures and investments (10,204) (11,367) (10,755)
(Increase) decrease in financial investments (1,012) 1,358 592
(Increase) decrease in derivatives financial instruments 298 238 (439)
(Increase) decrease in other items interest bearing (10) 343 79
Proceeds from sale of assets and businesses 2,608 1,773 406
Cash flows used in investing activities (10,594) (11,212) (10,117)
Cash flows from (used in) financing activities [abstract]      
New finance debt 984 998 0
Repayment of finance debt (2,419) (2,875) (4,775)
Dividend paid (3,342) (2,672) (1,491)
Share buy-back (442) 0 0
Net current finance debt and other (277) (476) 444
Cash flows provided by (used in) financing activities (5,497) (5,024) (5,822)
Net increase (decrease) in cash and cash equivalents (2,341) 3,458 (1,137)
Effect of exchange rate changes on cash and cash equivalents (38) (292) 436
Cash and cash equivalents at the beginning of the period (net of overdraft) 7,556 4,390 5,090
Cash and cash equivalents at the end of the period (net of overdraft) $ 5,177 $ 7,556 $ 4,390