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14 INCOME TAX AND SOCIAL CONTRIBUTION (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax And Social Contribution [Abstract]      
Income tax and social contribution income (expense), current R$ (1,564,622) R$ (827,229) R$ (358,981)
Income tax and social contribution income (expense), deferred 2,398,400 576,895 (50,128)
Income tax and social contribution income (expense) R$ (833,778) R$ 250,334 R$ 409,109