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38. NON-CASH TRANSACTIONS (Details Narrative) - BRL (R$) R$ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 27, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Non Cash Activities [line items] |  |  |  |
Capitalized financial costs |  | R$ 23 | R$ 30 | R$ 71
Minas Gerais State Government [Member] |  |  |  |
Disclosure Of Non Cash Activities [line items] |  |  |  |
Settlement of receivables from retention of dividends | R$ 148 |  |  |
Rio Minas Energia Participacoes S.A. and Luce Empreendimentos e Participacoes S.A. [Member] |  |  |  |
Disclosure Of Non Cash Activities [line items] |  |  |  |
Payment of cash arising from acquisition of the subsidiaries |  | 22 |  |
Parajuru and Volta do Rio [Member] |  |  |  |
Disclosure Of Non Cash Activities [line items] |  |  |  |
Payment of cash arising from acquisition of the subsidiaries |  | 5 |  |
Cash arising from acquisition of the subsidiaries |  | 4 |  |
RME [Member] |  |  |  |
Disclosure Of Non Cash Activities [line items] |  |  |  |
Payment of cash arising from acquisition of the subsidiaries |  | 67 |  |
Cash arising from acquisition of the subsidiaries |  | R$ 104 |  |

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