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Biological assets - Measurement of the premises adopted (Details) - ha
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about biological assets [line items]    
Useful productive planted area (hectare) 1,243,191,000 1,094,611,000
Average Annual Growth Volume Per Hectare Per Year 37,620 37,920
Average gross sale price of eucalyptus 101,380 96,040.00
Label Role Discount rate post-tax 8.80% 8.80%
Mature biological assets [member]    
Disclosure of detailed information about biological assets [line items]    
Useful productive planted area (hectare) 191,737,000 144,942,000
Immature biological assets [member]    
Disclosure of detailed information about biological assets [line items]    
Useful productive planted area (hectare) 1,051,454,000 949,669,000