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Basis of preparation of financial statements (Details Narrative) R$ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2022 BRL (R$) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 BRL (R$)
IfrsStatementLineItems [Line Items] |  |  |  |
Acquisition new steel |  |  | $ 496 |
Provision amount | $ 57 |  |  |
Provision amount | 1,093 |  |  |
Outstanding balances related suppliers | 202 |  |  |
Indemnity Agreements 1 [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Provision amount | $ 7 |  |  |
Indemnity Agreements 2 [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Provision amount | R$ |  | R$ 39 |  |
Vale Inc [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Acquisition new steel | R$ |  |  |  | R$ 1,884
Provision amount | R$ |  | R$ 292 |  |

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- Definition The amount of provisions for doubtful debts related to the amount of outstanding balances in related party transactions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2022-03-24 -Paragraph 18 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2022-en-r&anchor=para_18_c&doctype=Standard -URIDate 2022-03-24 + Details
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