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REIMBURSEMENT RIGHTS AND OBLIGATIONS (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
REIMBURSEMENT RIGHTS AND OBLIGATIONS    
Fuel consumption account - CCC R$ 652,154 R$ 615,540
Reimbursement of Fixed Assets in Progress - AIC 248,438 211,950
Adjustment Factor Itaipu 79,614 389,438
Current assets 980,206 1,216,928
Fuel consumption account - CCC 1,617,808 2,170,928
Estimated losses CCC - ECL (340,063) (340,063)
Reimbursement of Fixed Assets in Progress - AIC 107,734 294,042
Reimbursement rights, Non-current assets 1,385,479 2,124,907
Total right of reimbursement 2,365,685 3,341,835
PROINFA 8,572 1,912,423
Total reimbursement obligation R$ 8,572 R$ 1,912,423