v3.26.1
POST-EMPLOYMENT BENEFIT - Actuarial and Economic Hypotheses (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Projection of average wage increase (%) 0.00%  
Table of active and inactive mortality    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Smoothed percentage   0.10%
Aggravated percentage   25.00%
Table of disability    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Smoothed percentage 50.00% 50.00%
Aggravated percentage   20.00%
Relieved percentage 20.00%  
Minimum    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Actual annual actuarial discount interest rate (%) 5.49% 5.49%
Projection of average wage increase (%)   0.00%
Minimum | Table of active and inactive mortality    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Smoothed percentage 10.00%  
Maximum    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Actual annual actuarial discount interest rate (%) 7.83% 8.10%
Projection of average wage increase (%)   0.98%
Maximum | Table of active and inactive mortality    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Smoothed percentage 25.00%  
Pension benefit plans    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Average annual inflation rate (%) 3.50% 3.50%
Expected return on plan assets (%) 3.50% 3.50%
Social security defined benefit plans | Plan assets    
Actuarial assumptions determine the defined benefit obligation and expenses for the year    
Effective return on liability (asset) for the year R$ 2,931,050 R$ (251,420)