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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, 2022
Dec. 31, 2021
Dec. 31, 2020
EMPLOYEE BENEFITS      
Cost of service R$ 3,005 R$ 3,458 R$ 4,964
Interest expense 8,102 8,239 11,311
Present value of the defined benefit obligations      
EMPLOYEE BENEFITS      
Obligation at the beginning of the year 318,181 362,944 298,989
Cost of service 3,005 3,458 4,964
Interest expense 8,102 8,239 11,311
Past service cost   (32,434) (660)
Contributions from participants 1,472 2,032 2,349
Payment of benefits (17,488) (17,431) (20,870)
Gain (loss) on remeasurement (61,524) (36,938) (23,533)
Exchange variations (27,568) 28,311 90,394
Obligation at the end of the year R$ 224,180 R$ 318,181 R$ 362,944