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EMPLOYEE BENEFITS - Post-employment health care benefit plan - Change in obligation (Details) - Post-employment health care benefit - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
EMPLOYEE BENEFITS      
Cost of service R$ 2,069 R$ 3,005 R$ 3,458
Interest expense 10,127 8,102 8,239
Present value of the defined benefit obligations      
EMPLOYEE BENEFITS      
Obligation at the beginning of the year 224,180 318,181 362,944
Cost of service 2,069 3,005 3,458
Interest expense 10,127 8,102 8,239
Past service cost     (32,434)
Contributions from participants 1,096 1,472 2,032
Payment of benefits (20,265) (17,488) (17,431)
Gain (loss) on remeasurement (7,232) (61,524) (36,938)
Exchange variations (13,530) (27,568) 28,311
Obligation at the end of the year R$ 196,445 R$ 224,180 R$ 318,181