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26 Accounts Payable Related to Concessions (Details 2) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | R$ 731,864 | R$ 612,587 | R$ 584,163
Present value [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 731,864 |  |
Present value [member] | 2021 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 88,951 |  |
Present value [member] | 2022 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 78,757 |  |
Present value [member] | 2022 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 71,101 |  |
Present value [member] | 2023 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 64,195 |  |
Present value [member] | After 2024 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 428,860 |  |
Nominal value [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 1,505,293 |  |
Nominal value [member] | 2021 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 87,432 |  |
Nominal value [member] | 2022 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 87,432 |  |
Nominal value [member] | 2022 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 87,432 |  |
Nominal value [member] | 2023 [member] |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | 87,432 |  |
Nominal value [member] | After 2024 |  |  |
DisclosureOfAccountsPayableRelatedToConcessionsLineItems [Line Items] |  |  |
Accounts payable related to concession | R$ 1,155,565 |  |

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