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Legal proceedings (Details Narrative) R$ in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2022 BRL (R$) | Aug. 31, 2020 USD ($) | Aug. 31, 2020 BRL (R$) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 BRL (R$) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 BRL (R$)
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Indemnification payment | $ 122 | R$ 590 |  |  | $ 2 | R$ 10 |  |
Claim amount received |  |  | $ 55 | R$ 301 |  |  |  |
Gain on other assets |  |  |  |  | 48 |  |  |
Guarantee Obligations, Bank Guarantee |  |  |  |  | 2,700 |  | $ 2,300 |
Cfem Related Proceedings [Member] |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Estimated Loss on Legal Proceedings |  |  |  |  | 2,132 | 10,320 | 1,831 | R$ 9,555
Assessments And Legal Proceedings Related To Pis Cofins [Member] |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Estimated Loss on Legal Proceedings |  |  |  |  | 2,198 | 10,640 | 1,720 | 8,975
Tax On Services [Member] |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Estimated Loss on Legal Proceedings |  |  |  |  | 738 | 3,573 | 626 | 3,268
Assessments And Legal Proceedings Related To Tax On Services [Member] |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Estimated Loss on Legal Proceedings |  |  |  |  | 586 | 2,835 | 558 | 2,910
Tax Proceedings Fines Arising From Offsets Not Approved For Settlement Of Federal Debts [Member] |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Estimated Loss on Legal Proceedings |  |  |  |  | 626 | 3,032 | 524 | 2,735
Environmental Litigations Iron Ore Operations In Itabira [Member] |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |
Loss contingency damages sought value |  |  |  |  | $ 524 | R$ 2,538 | $ 431 | R$ 2,249

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