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CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from (used in) operating activities [abstract]      
Income / (loss) before tax $ (4,259) $ 9,292 $ 18,874
Depreciation, amortisation and net impairment losses 15,235 13,204 9,249
Exploration expenditures written off 2,506 777 357
(Gains) losses on foreign currency transactions and balances 646 (224) 166
(Gains) losses on sales of assets and businesses 18 (1,187) (648)
(Increase) decrease in other items related to operating activities 918 1,016 (526)
(Increase) decrease in net derivative financial instruments (451) (595) 409
Interest received 162 215 176
Interest paid (730) (723) (441)
Cash flows provided by operating activities before taxes paid and working capital items 14,045 21,776 27,615
Taxes paid (3,134) (8,286) (9,010)
(Increase) decrease in working capital (524) 259 1,090
Cash flows provided by operating activities 10,386 13,749 19,694
Cash flows from (used in) investing activities [abstract]      
Cash used in business combinations [1] 0 (2,274) (3,557)
Capital expenditures and investments (8,476) (10,204) (11,367)
(Increase) decrease in financial investments (3,703) (1,012) 1,358
(Increase) decrease in derivatives financial instruments (620) 298 238
(Increase) decrease in other items interest bearing 202 (10) 343
Proceeds from sale of assets and businesses 505 2,608 1,773
Cash flows used in investing activities (12,092) (10,594) (11,212)
Cash flows from (used in) financing activities [abstract]      
New finance debt 8,347 984 998
Repayment of finance debt (3,332) (2,419) (2,875)
Dividend paid (2,330) (3,342) (2,672)
Share buy-back (1,059) (442) 0
Net current finance debt and other 1,365 (277) (476)
Cash flows provided by (used in) financing activities 2,991 (5,496) (5,024)
Net increase (decrease) in cash and cash equivalents 1,285 (2,341) 3,458
Effect of exchange rate changes on cash and cash equivalents 294 (38) (292)
Cash and cash equivalents at the beginning of the period (net of overdraft) 5,177 7,556 4,390
Cash and cash equivalents at the end of the period (net of overdraft) $ 6,757 $ 5,177 $ 7,556
[1]

Net after cash and cash equivalents acquired.