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27. OTHER OPERATING INCOME AND EXPENSES (Details Narrative) - BRL (R$)
R$ in Thousands
 12 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Other Operating Income And Expenses        
Receivables by indemnity R$ 84,435 R$ 517,183
Rent arrears 58,785      
Collection of insurance for material damage 25,650      
Principal amount receivables for indemnity R$ 147,612      
Other operating expenses   1,667,886 R$ 790,353  
Cash flow hedge of PLATTS index   283,149    
Cash flow hedge realized   R$ (1,951,035)