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14. CONCESSION FINANCIAL AND SECTOR ASSETS AND LIABILITIES (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 02, 2019 | [1] | Dec. 31, 2018
--- | --- | --- | --- | --- | ---
Financial assets of the concession |  |  |  |  |
Assets | R$ 4,058,000 |  |  |  |
Current assets | 258,000 |  |  |  |
Non-current assets | 3,799,000 |  |  |  |
Current liabilities | 231,000 |  |  |  |
Non-current liabilities |  |  |  |  |
Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  | R$ 4,650,000 |  |  | R$ 4,702,000
Current assets |  | 891,000 | [1] | R$ 890,000 | 890,000
Non-current assets |  | 3,759,000 | [1] | R$ 3,812,000 | 3,812,000
Current liabilities |  |  |  |  |
Non-current liabilities |  |  |  |  |
Assets related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 3,924,000 |  |  |  |
Assets related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 3,924,000 | 3,768,000 |  |  | 3,621,000
Energy distribution concession [member] | Assets related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 530,000 |  |  |  |
Energy distribution concession [member] | Assets related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  | 460,000 |  |  | 396,000
Gas distribution concession [member] | Assets related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 29,000 |  |  |  |
Gas distribution concession [member] | Assets related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  | 24,000 |  |  |
Generation receivable [member] | Assets related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 816,000 |  |  |  |
Generation receivable [member] | Assets related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  | 816,000 |  |  | 816,000
Concession grant fee [member] | Assets related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 2,549,000 |  |  |  |
Concession grant fee [member] | Assets related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  | 2,468,000 |  |  | 2,409
Cva and other financial components in tariff adjustments [member] | Assets related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets | 133,000 |  |  |  |
Cva and other financial components in tariff adjustments [member] | Assets related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  | 882,000 |  |  |
Cva and other financial components in tariff adjustments [member] | Liabilities related to infrastructure [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Current liabilities | R$ 231,000 |  |  |  |
Cva and other financial components in tariff adjustments [member] | Liabilities related to infrastructure [member] | Restated [member] |  |  |  |  |
Financial assets of the concession |  |  |  |  |
Assets |  |  |  |  | R$ 1,081,000
Current liabilities |  |  |  |  |
[1] | For further details of restatement of comparative balances, see Note 2.8

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