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24 Sectorial Charges Due (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
DisclosureOfCustomerChargesDueLineItems [Line Items] |  |
Customer charges due | R$ 28,508 | R$ 79,872
Energy Development Account (CDE) [Member] |  |
DisclosureOfCustomerChargesDueLineItems [Line Items] |  |
Customer charges due | 4,104 | 73,549
Global Reversal Reserve (RGR) [Member] |  |
DisclosureOfCustomerChargesDueLineItems [Line Items] |  |
Customer charges due | 12,068 | 6,323
Tariff flags [Member] |  |
DisclosureOfCustomerChargesDueLineItems [Line Items] |  |
Customer charges due | R$ 12,336 | R$ 0

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