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32 Operating Costs and Expenses (Details 3) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | R$ 558,041 |  |
Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | R$ 526,008 | R$ 481,101
Maintenance of electrical system [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | 206,688 |  |
Maintenance of electrical system [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | 164,510 | 144,163
Maintenance of facilities [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | 97,889 |  |
Maintenance of facilities [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | 102,295 | 88,186
Consumer service [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | 54,713 |  |
Consumer service [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | 35,548 | 15,470
Meter reading and bill delivery [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | 48,895 |  |
Meter reading and bill delivery [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | 45,515 | 43,968
Communication processing and transmission of data [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | 42,244 |  |
Communication processing and transmission of data [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | 51,919 | 47,954
Consulting and audit [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | 41,043 |  |
Consulting and audit [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | 20,456 | 40,694
Other services [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense | R$ 66,569 |  |
Other services [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Third-party services expense |  | R$ 105,765 | R$ 100,666

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