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18. INCOME TAX AND SOCIAL CONTRIBUTION (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax And Social Contributions      
Income tax and social contribution income (expense), current R$ (2,052,204) R$ (1,564,622) R$ (827,229)
Income tax and social contribution income (expense), deferred 1,426,696 2,398,400 576,895
Income tax and social contribution income (expense) R$ 625,508 R$ (833,778) R$ 250,334