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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Fair value settled amounts (Details) - BRL (R$)
R$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Financial Instruments and Risks    
Cash (paid) received R$ 186,312 R$ (1,921,253)
Operational Hedge    
Financial Instruments and Risks    
Cash (paid) received 585,875 (1,267,832)
Operational Hedge | Zero cost collar (R$ x U.S.$)    
Financial Instruments and Risks    
Cash (paid) received 577,875 (1,269,231)
Operational Hedge | NDF (R$ x US$)    
Financial Instruments and Risks    
Cash (paid) received 8,000 1,399
Commodity Hedge    
Financial Instruments and Risks    
Cash (paid) received   (54,002)
Commodity Hedge | Swap VLSFO/other    
Financial Instruments and Risks    
Cash (paid) received   (54,002)
Debt Hedge    
Financial Instruments and Risks    
Cash (paid) received (399,563) (599,419)
Debt Hedge | Swap CDI x Fixed (U.S.$)    
Financial Instruments and Risks    
Cash (paid) received (222,068) (266,268)
Debt Hedge | Swap IPCA to CDI    
Financial Instruments and Risks    
Cash (paid) received (455) 41,651
Debt Hedge | Swap IPCA to Fixed (U.S.$)    
Financial Instruments and Risks    
Cash (paid) received   (4,819)
Debt Hedge | Swap Pre-Fixed to U.S.$ (U.S.$)    
Financial Instruments and Risks    
Cash (paid) received 54,128 49,562
Debt Hedge | Swap LIBOR to Fixed (U.S.$)    
Financial Instruments and Risks    
Cash (paid) received R$ (231,168) R$ (419,545)