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SHORT-TERM DEBT AND LONG-TERM DEBT - Amortization schedules (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Amortization schedules of long-term loans and financing    
Long-term debt R$ 10,875,249 R$ 13,188,891
2022    
Amortization schedules of long-term loans and financing    
Long-term debt   5,210
2023    
Amortization schedules of long-term loans and financing    
Long-term debt 1,115,211 2,108,324
2024    
Amortization schedules of long-term loans and financing    
Long-term debt 878,044 1,813,225
2025    
Amortization schedules of long-term loans and financing    
Long-term debt 405,788 682,422
2026    
Amortization schedules of long-term loans and financing    
Long-term debt R$ 8,476,206 R$ 8,579,710