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Derivative financial instruments (Details - Forward and swap contracts - notional value) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of detailed information about financial instruments [line items] |  |
Notional value | R$ 172,856 | R$ 288,592
Forward and swap contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 259,881 | 316,105
Up to 3 months | Forward and swap contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 86,948 |
From 3 to 12 months | Forward and swap contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 94,856 |
1 year to 3 years | Forward and swap contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 53,500 |
Later than three years [member] | Forward and swap contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 24,577 |
Swap contracts - liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 172,933 | 288,592
Swap contracts - liabilities | From 3 to 12 months |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 94,856 |
Swap contracts - liabilities | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 53,500 |
Swap contracts - liabilities | Later than three years [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 24,577 |
Forward contract - assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | 86,948 | R$ 27,513
Forward contract - assets | Up to 3 months |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional value | R$ 86,948 |

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- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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