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POST-EMPLOYMENT BENEFIT - Sensitivity analysis (Details) - Pension benefit plans
R$ in Thousands
Dec. 31, 2023
BRL (R$)
Sensitivity analysis  
Decrease in defined benefit obligation R$ (3,248,553)
Increase in defined benefit obligation R$ 1,628,493
Discount rate  
Sensitivity analysis  
Rate increase (as a percent) 1.00%
Rate decrease (as a percent) 1.00%
Decrease in defined benefit obligation R$ (3,248,553)
Increase in defined benefit obligation R$ 1,628,493
Wages growth  
Sensitivity analysis  
Rate decrease (as a percent) 1.00%
Decrease in defined benefit obligation R$ 105,768
Increase in defined benefit obligation R$ (98,656)