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8 Financial investments (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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FinancialInvestmentsLineItems [Line Items] |  |
Financial investments | R$ 3,411,146 | R$ 0
Banco BV [member] |  |
FinancialInvestmentsLineItems [Line Items] |  |
Financial investments | 253,066 |
Banco Itau S/A [member] |  |
FinancialInvestmentsLineItems [Line Items] |  |
Financial investments | 354,296 |
Banco Bradesco S/A [member] |  |
FinancialInvestmentsLineItems [Line Items] |  |
Financial investments | 506,136 |
Banco BTG Pactual S/A [member] |  |
FinancialInvestmentsLineItems [Line Items] |  |
Financial investments | 354,299 |
Banco do Brasil S/A [member] |  |
FinancialInvestmentsLineItems [Line Items] |  |
Financial investments | R$ 1,943,349 |

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- Definition The amount of current financial assets measured at amortised cost. [Refer: Financial assets at amortised cost] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_f&doctype=Standard -URIDate 2020-01-01 + Details
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