v3.26.1
Biological assets - Roll-forward of biological assets (Details) - BRL (R$)
R$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of reconciliation of changes in biological assets [line items]      
Opening Balance R$ 26,097,164 R$ 22,283,001 R$ 22,283,001
Additions 3,617,275   7,913,483
Depletions (3,174,187)   (5,352,271)
Transfers   15,233
Fair value adjustment of biological assets (1,157,728) R$ 73,248 (1,516,458)
Disposals (21,674)   (107,815)
Write-offs (44,611)   (170,925)
Closing Balance R$ 27,631,695   R$ 26,097,164
Effective Area For Forest From The Year Of Planting 3 years    
Bottom of range [member]      
Disclosure of reconciliation of changes in biological assets [line items]      
Average Cycle for Formation of Forests, Biological Assets 6 years    
Top of range      
Disclosure of reconciliation of changes in biological assets [line items]      
Average Cycle for Formation of Forests, Biological Assets 7 years