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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Net debt and Short-term investments (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Notes and other explanatory information [abstract] |  |  |  |  |  |  |
Debt contracts |  | $ 12,417 |  | $ 11,181 |  |  |
Leases |  | 1,520 |  | 1,531 |  |  |
Total of loans, borrowings and leases |  | 13,937 |  | 12,712 |  |  |
Cash and cash equivalents |  | 4,983 | $ 4,705 | 4,736 | $ 7,185 | $ 9,061 | $ 11,721
Short-term investments | [1] | 46 |  | 61 |  |  |
Net debt (cash) |  | $ 8,908 |  | $ 7,915 |  |  |
[1] | Substantially comprises investments in exclusive investment fund, whose portfolio is composed of committed transactions and Selic Treasury Notes (“LFTs”), which are floating-rate securities issued by the Brazilian government.

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph B13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_i&doctype=Standard -URIDate 2023-03-23 + Details
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