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Schedule of equity in results (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | R$ 219,508 | R$ 124,324 | R$ 125,715
Eliminations to cost of sale | (62,982) | (46,751) |
Eliminations to taxes | 21,414 | 15,895 |
Equity in results | 182,504 | 71,755 |
Amortizated At Fair Value Investment In M R S [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | (11,747) | (11,747) |
M R S Logistica S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | 260,622 | 160,370 |
Transnordestina Logistica S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | (45,870) | (28,952) |
Arvedi Metalfer Do Brasil S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | 3,265 | (6,765) |
Equimac S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | (608) | (329) |
Other Investment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity in results of affiliated companies | 2,099 |  |
Equity in result of affiliated companies other | R$ 16,311 | R$ (9,966) |

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