v3.26.1
PROVISION FOR JUDICIAL LIABILITIES - Roll-forward and changes in the provision for probable losses, net of judicial deposits (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2025
BRL (R$)
item
Dec. 31, 2025
BRL (R$)
item
Dec. 31, 2024
BRL (R$)
item
Probable losses      
Disclosure of other provisions [line items]      
Balance provision at the beginning for the period R$ 3,105,168,000 R$ 3,105,168,000 R$ 3,112,877,000
Payments   (194,708,000) (156,097,000)
Reversal   (239,045,000) (129,252,000)
Additions   156,923,000 239,750,000
Monetary adjustment   88,551,000 37,890,000
Provision Balance   2,916,889,000 3,105,168,000
Judicial deposits   (115,151,000) (178,418,000)
Balance provision at the end for the period   2,801,738,000 2,926,750,000
Probable losses | Tax and social security      
Disclosure of other provisions [line items]      
Balance provision at the beginning for the period 407,964,000 407,964,000 468,839,000
Payments   (71,692,000) (60,081,000)
Reversal   (51,228,000) (9,540,000)
Additions   14,650,000 4,689,000
Monetary adjustment   40,069,000 4,057,000
Provision Balance   339,763,000 407,964,000
Judicial deposits   (31,579,000) (66,746,000)
Balance provision at the end for the period   308,184,000 341,218,000
Probable losses | Labor      
Disclosure of other provisions [line items]      
Balance provision at the beginning for the period 353,926,000 353,926,000 349,058,000
Payments   (113,840,000) (89,221,000)
Reversal   (99,936,000) (89,941,000)
Additions   128,217,000 162,456,000
Monetary adjustment   27,991,000 21,574,000
Provision Balance   296,358,000 353,926,000
Judicial deposits   (62,334,000) (91,596,000)
Balance provision at the end for the period   234,024,000 262,330,000
Probable losses | Civil, environment and real estate      
Disclosure of other provisions [line items]      
Balance provision at the beginning for the period 215,553,000 215,553,000 139,435,000
Payments   (9,176,000) (6,795,000)
Reversal   (55,513,000) (1,951,000)
Additions   14,056,000 72,605,000
Monetary adjustment   20,491,000 12,259,000
Provision Balance   185,411,000 215,553,000
Judicial deposits   (21,238,000) (20,076,000)
Balance provision at the end for the period   164,173,000 195,477,000
Probable losses | Classes of contingent liabilities [domain]      
Disclosure of other provisions [line items]      
Balance provision at the beginning for the period R$ 2,127,725,000 2,127,725,000 2,155,545,000
Payments  
Reversal   (32,368,000) (27,820,000)
Additions  
Monetary adjustment  
Provision Balance   2,095,357,000 2,127,725,000
Balance provision at the end for the period   R$ 2,095,357,000 R$ 2,127,725,000
Possible losses and remote losses | Tax and social security      
Disclosure of other provisions [line items]      
Number of Administrative Proceedings and Lawsuits | item 58 56  
Possible losses and remote losses | Labor      
Disclosure of other provisions [line items]      
Number of Lawsuits | item   1,152 1,178
Possible losses and remote losses | Civil, environment and real estate      
Disclosure of other provisions [line items]      
Number of Lawsuits | item   73 97
Possible losses and remote losses | Civil, environment and real estate | Fibria      
Disclosure of other provisions [line items]      
Loss Contingency, Estimate of Possible Loss   R$ 132,808,000 R$ 133,281
Possible losses and remote losses | Tax contingent liability | Fibria      
Disclosure of other provisions [line items]      
Loss Contingency, Estimate of Possible Loss   R$ 1,962,549,000 R$ 1,994,444