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DEBENTURES - Amortization schedule (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
DEBENTURES    
Non-current debentures R$ 2,894,954 R$ 2,893,029
2022    
DEBENTURES    
Non-current debentures 1,497,760 1,496,591
2023    
DEBENTURES    
Non-current debentures 598,960 598,530
2027 on    
DEBENTURES    
Non-current debentures R$ 798,234 R$ 797,908