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Exploration and evaluation of oil and gas reserves (Details 1) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Exploration costs recognized in the statement of income |  |  |
Geological and geophysical expenses | $ (342) | $ (358) | $ 296
Exploration expenditures written off (includes dry wells and signature bonuses) | (691) | (248) | 456
Contractual penalties on local content requirements | 165 | (47) | 38
Other exploration expenses | (19) | (34) | 13
Total expenses | (887) | (687) | 803
Cash used in: |  |  |
Operating activities | 360 | 393 | 307
Investment activities | 1,253 | 555 | 532
Total cash used | $ 1,613 | $ 948 | $ 839

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- Definition The cash flows from (used in) the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource, classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2022-03-24 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2022-en-r&anchor=para_24_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The cash flows from (used in) the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource, classified as operating activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2022-03-24 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2022-en-r&anchor=para_24_b&doctype=Standard -URIDate 2022-03-24 + Details
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