v3.26.1
Provision for judicial liabilities - Roll-forward and changes in the provision for probable losses, net of judicial deposits (Details)
R$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
BRL (R$)
item
Mar. 31, 2025
BRL (R$)
Jun. 30, 2025
BRL (R$)
item
Dec. 31, 2025
BRL (R$)
item
Probable losses        
Disclosure of other provisions [line items]        
Balance provision at the beginning for the period R$ 2,916,889 R$ 3,105,168 R$ 3,105,168  
Payments (16,748) (194,708)    
Reversal (47,341) (239,045)    
Additions 52,437 156,923    
Monetary adjustment 15,372 88,551    
Provision Balance 2,920,609      
Judicial deposits (145,283)     R$ (115,151)
Balance provision at the end for the period 2,775,326     2,801,738
Probable losses | Tax and social security        
Disclosure of other provisions [line items]        
Balance provision at the beginning for the period 339,763 407,964 407,964  
Payments (698) (71,692)    
Reversal (2,375) (51,228)    
Additions 745 14,650    
Monetary adjustment 5,433 40,069    
Provision Balance 342,868      
Judicial deposits (32,188)     (31,579)
Balance provision at the end for the period 310,680     308,184
Probable losses | Labor        
Disclosure of other provisions [line items]        
Balance provision at the beginning for the period 296,358 353,926 353,926  
Payments (16,050) (113,840)    
Reversal (19,300) (99,936)    
Additions 33,474 128,217    
Monetary adjustment 6,255 27,991    
Provision Balance 300,737      
Judicial deposits (52,880)     (62,334)
Balance provision at the end for the period 247,857     234,024
Probable losses | Civil, environment and real estate        
Disclosure of other provisions [line items]        
Balance provision at the beginning for the period 185,411 215,553 215,553  
Payments (9,176)    
Reversal (11) (55,513)    
Additions 18,218 14,056    
Monetary adjustment 3,684 20,491    
Provision Balance 207,302      
Judicial deposits (60,215)     (21,238)
Balance provision at the end for the period 147,087     164,173
Probable losses | Classes of contingent liabilities [domain]        
Disclosure of other provisions [line items]        
Balance provision at the beginning for the period 2,095,357 2,127,725 R$ 2,127,725  
Payments    
Reversal (25,655) (32,368)    
Additions    
Monetary adjustment    
Provision Balance 2,069,702      
Balance provision at the end for the period R$ 2,069,702     R$ 2,095,357
Possible losses and remote losses | Tax and social security        
Disclosure of other provisions [line items]        
Number of Administrative Proceedings and Lawsuits | item 54   56  
Possible losses and remote losses | Labor        
Disclosure of other provisions [line items]        
Number of Lawsuits | item 1,152     1,152
Possible losses and remote losses | Civil, environment and real estate        
Disclosure of other provisions [line items]        
Number of Lawsuits | item 72     73
Possible losses and remote losses | Civil, environment and real estate | Fibria        
Disclosure of other provisions [line items]        
Loss Contingency, Estimate of Possible Loss R$ 128,133     R$ 132,808
Possible losses and remote losses | Tax contingent liability | Fibria        
Disclosure of other provisions [line items]        
Loss Contingency, Estimate of Possible Loss R$ 1,941,569     R$ 1,962,549