v3.26.1
Property, plant and equipment - Items pledged as collateral (Details) - BRL (R$)
R$ in Thousands
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Disclosure of detailed information about property, plant and equipment [abstract]    
Disclosure of Property, Plant and Equipment Pledged as Collateral [Table]
On March 31, 2026, property, plant and equipment items pledged as collateral, consisting mainly of the units of Ribas do Rio Pardo, Três Lagoas and Imperatriz are set forth below:
Type of collateral3/31/202612/31/2025
Land
Financial/Legal
25,184 
25,562 
Buildings
Financial
1,714,933 
1,719,004 
Machinery, equipment and facilities
Financial
8,596,324 
19,437,703 
Work in progress
Financial
351,961 
339,063 
Other
Financial
51,379 
48,475 
10,739,781 
21,569,807 
  
Disclosure of Property, Plant and Equipment Pledged as Collateral [Line Items]    
Property, plant and equipment, pledged as security R$ 10,739,781 R$ 21,569,807
Land    
Disclosure of Property, Plant and Equipment Pledged as Collateral [Line Items]    
Property, plant and equipment, pledged as security 25,184 25,562
Buildings    
Disclosure of Property, Plant and Equipment Pledged as Collateral [Line Items]    
Property, plant and equipment, pledged as security 1,714,933 1,719,004
Machinery, equipment and facilities    
Disclosure of Property, Plant and Equipment Pledged as Collateral [Line Items]    
Property, plant and equipment, pledged as security 8,596,324 19,437,703
Work in progress    
Disclosure of Property, Plant and Equipment Pledged as Collateral [Line Items]    
Property, plant and equipment, pledged as security 351,961 339,063
Other    
Disclosure of Property, Plant and Equipment Pledged as Collateral [Line Items]    
Property, plant and equipment, pledged as security R$ 51,379 R$ 48,475