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13. ACCOUNTS RECEIVABLE FROM THE STATE OF MINAS GERAIS (Details Narrative) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of accounts receivables [abstract] |  |
Description of payment from state of minas gerais | 12 consecutive monthly installments |
Amounts received from minas gerais state government | R$ 148 |
Remaining amounts receivable from recognized in non current assets | R$ 115 | R$ 246

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