v3.26.1
Property, plant and equipment - Summary (Details) - BRL (R$)
R$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance R$ 64,296,187 R$ 64,986,040
Additions 890,563 4,578,826
Acquisitions through business combinations, property, plant and equipment  
Write-offs (39,979) (426,152)
Depreciation (1,171,043) (4,845,176)
Transfers and other 154 2,649
Ending balance 63,975,882  
Land    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 16,720,186 16,775,348
Additions 3,080
Acquisitions through business combinations, property, plant and equipment  
Write-offs (29,659) (64,222)
Depreciation
Transfers and other (1,219) 5,980
Ending balance R$ 16,689,308  
Buildings    
Disclosure of detailed information about property, plant and equipment [line items]    
Average rate % 3.43%  
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance R$ 9,929,884 9,522,593
Additions 262
Acquisitions through business combinations, property, plant and equipment  
Write-offs (2,632) (54,566)
Depreciation (115,557) (434,875)
Transfers and other 95,187 896,470
Ending balance R$ 9,906,882  
Machinery, equipment and facilities    
Disclosure of detailed information about property, plant and equipment [line items]    
Average rate % 7.21%  
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance R$ 34,178,753 34,280,498
Additions 65,886 649,533
Acquisitions through business combinations, property, plant and equipment  
Write-offs (5,219) (152,457)
Depreciation (1,015,917) (4,123,031)
Transfers and other 1,253,907 3,524,210
Ending balance 34,477,410  
Work in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 2,764,799 3,510,535
Additions 823,603 3,880,270
Acquisitions through business combinations, property, plant and equipment  
Write-offs
Depreciation
Transfers and other (1,335,089) (4,626,006)
Ending balance R$ 2,253,313  
Other    
Disclosure of detailed information about property, plant and equipment [line items]    
Average rate % 19.62%  
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance R$ 702,565 897,066
Additions 1,074 45,681
Acquisitions through business combinations, property, plant and equipment  
Write-offs (2,469) (154,907)
Depreciation (39,569) (287,270)
Transfers and other (12,632) 201,995
Ending balance 648,969  
Accumulated cost    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 102,257,419 98,731,202
Ending balance 102,753,957  
Accumulated cost | Land    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 16,720,186 16,775,348
Ending balance 16,689,308  
Accumulated cost | Buildings    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 14,589,194 13,816,631
Ending balance 14,677,846  
Accumulated cost | Machinery, equipment and facilities    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 66,353,229 62,822,096
Ending balance 67,342,071  
Accumulated cost | Work in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 2,764,799 3,510,535
Ending balance 2,253,313  
Accumulated cost | Other    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 1,830,011 1,806,592
Ending balance 1,791,419  
Accumulated depreciation    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance (37,961,232) (33,745,162)
Ending balance (38,778,075)  
Accumulated depreciation | Land    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance
Ending balance  
Accumulated depreciation | Buildings    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance (4,659,310) (4,294,038)
Ending balance (4,770,964)  
Accumulated depreciation | Machinery, equipment and facilities    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance (32,174,476) (28,541,598)
Ending balance (32,864,661)  
Accumulated depreciation | Work in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance
Ending balance  
Accumulated depreciation | Other    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance (1,127,446) R$ (909,526)
Ending balance R$ (1,142,450)