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Provision for judicial liabilities - Roll-forward and changes in the provision for probable losses, net of judicial deposits (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 BRL (R$) item | Dec. 31, 2024 BRL (R$) item | Dec. 31, 2023 BRL (R$) item
Probable losses |  |  |
Disclosure of other provisions [line items] |  |  |
Balance provision at the beginning for the period | R$ 3,112,877,000 | R$ 3,112,877,000 | R$ 3,440,154,000
Payments |  | (156,097,000) | (41,903,000)
Reversal |  | (129,252,000) | (620,907,000)
Additions |  | 239,750,000 | 270,681,000
Monetary adjustment |  | 37,890,000 | 64,852,000
Provision Balance |  | 3,105,168,000 | 3,112,877,000
Judicial deposits |  | (178,418,000) | (252,468,000)
Balance provision at the end for the period |  | 2,926,750,000 | 2,860,409,000
Probable losses | Fibria |  |  |
Disclosure of other provisions [line items] |  |  |
Reversal due to a change in probability, cancellation and/or due to settlement |  |  | 372,541,000
Probable losses | Taxes and social security (1) |  |  |
Disclosure of other provisions [line items] |  |  |
Balance provision at the beginning for the period | 468,839,000 | 468,839,000 | 419,915,000
Payments |  | (60,081,000) | (1,717,000)
Reversal |  | (9,540,000) | (18,035,000)
Additions |  | 4,689,000 | 37,656,000
Monetary adjustment |  | 4,057,000 | 31,020,000
Provision Balance |  | 407,964,000 | 468,839,000
Judicial deposits |  | (66,746,000) | (154,469,000)
Balance provision at the end for the period |  | 341,218,000 | 314,370,000
Probable losses | Labor |  |  |
Disclosure of other provisions [line items] |  |  |
Balance provision at the beginning for the period | 349,058,000 | 349,058,000 | 255,805,000
Payments |  | (89,221,000) | (37,172,000)
Reversal |  | (89,941,000) | (101,375,000)
Additions |  | 162,456,000 | 211,690,000
Monetary adjustment |  | 21,574,000 | 20,110,000
Provision Balance |  | 353,926,000 | 349,058,000
Judicial deposits |  | (91,596,000) | (82,305,000)
Balance provision at the end for the period |  | 262,330,000 | 266,753,000
Probable losses | Civil, environment and real estate |  |  |
Disclosure of other provisions [line items] |  |  |
Balance provision at the beginning for the period | 139,435,000 | 139,435,000 | 118,729,000
Payments |  | (6,795,000) | (3,014,000)
Reversal |  | (1,951,000) | (11,337,000)
Additions |  | 72,605,000 | 21,335,000
Monetary adjustment |  | 12,259,000 | 13,722,000
Provision Balance |  | 215,553,000 | 139,435,000
Judicial deposits |  | (20,076,000) | (15,694,000)
Balance provision at the end for the period |  | 195,477,000 | 123,741,000
Probable losses | Classes of contingent liabilities [domain] |  |  |
Disclosure of other provisions [line items] |  |  |
Balance provision at the beginning for the period | R$ 2,155,545,000 | 2,155,545,000 | 2,645,705,000
Payments |  |  |
Reversal |  | (27,820,000) | (490,160,000)
Additions |  |  |
Monetary adjustment |  |  |
Provision Balance |  | 2,127,725,000 | 2,155,545,000
Balance provision at the end for the period |  | R$ 2,127,725,000 | R$ 2,155,545,000
Possible losses and remote losses | Taxes and social security (1) |  |  |
Disclosure of other provisions [line items] |  |  |
Number of Administrative Proceedings and Lawsuits | item | 32 | 58 |
Possible losses and remote losses | Labor |  |  |
Disclosure of other provisions [line items] |  |  |
Number of Lawsuits | item |  | 1,178 | 1,241
Possible losses and remote losses | Civil, environment and real estate |  |  |
Disclosure of other provisions [line items] |  |  |
Number of Lawsuits | item |  | 97 | 76
Possible losses and remote losses | Civil, environment and real estate | Fibria |  |  |
Disclosure of other provisions [line items] |  |  |
Loss Contingency, Estimate of Possible Loss |  | R$ 133,281,000 | R$ 140,470
Possible losses and remote losses | Tax contingent liability [member] | Fibria |  |  |
Disclosure of other provisions [line items] |  |  |
Loss Contingency, Estimate of Possible Loss |  | R$ 1,994,444,000 | R$ 2,015,075

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