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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Derivatives outstanding by type of contract, classified (Details) - BRL (R$)
R$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT    
Current assets R$ 1,204,841 R$ 484,043
Non-current assets 764,156 857,377
Current liabilities (1,010,897) (1,991,118)
Non-current liabilities (5,060,920) (6,126,282)
Total, net R$ (4,102,820) R$ (6,775,980)