v3.26.1
Marketable securities (Details) - BRL (R$)
R$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Disclosure of financial assets [line items]    
Marketable Securities R$ 10,503,715 R$ 10,252,454
Current 10,173,578 9,932,774
Non-Current 330,137 319,680
Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities 9,969,935 9,825,125
Foreign countries    
Disclosure of financial assets [line items]    
Marketable Securities R$ 533,780 427,329
Private Funds | CDI    
Disclosure of financial assets [line items]    
Percentage of basis used to calculate interest rate 101.34%  
Private Funds | Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities R$ 776,936 526,526
Private Securities | CDI/IPCA    
Disclosure of financial assets [line items]    
Percentage of basis used to calculate interest rate 6.15%  
Private Securities | Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities R$ 1,298,243  
Private Securities (CDBs) | CDI    
Disclosure of financial assets [line items]    
Percentage of basis used to calculate interest rate 101.00%  
Private Securities (CDBs) | Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities R$ 6,912,231 7,045,434
CDBs - Escrow Account | CDI    
Disclosure of financial assets [line items]    
Percentage of basis used to calculate interest rate 99.61%  
CDBs - Escrow Account | Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities R$ 330,137 319,680
Time Deposits | Foreign countries    
Disclosure of financial assets [line items]    
Marketable Securities R$ 525,601 421,291
Time Deposits | Foreign countries | Fixed    
Disclosure of financial assets [line items]    
Average yield p.a. % 4.43%  
Other | Foreign countries    
Disclosure of financial assets [line items]    
Marketable Securities R$ 8,179 6,038
Other (Restricted financial investment) | CDI    
Disclosure of financial assets [line items]    
Percentage of basis used to calculate interest rate 99.99%  
Other (Restricted financial investment) | Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities 25,618
Public Securities - Instituto de Crédito Oficial (ICO) | Fixed    
Disclosure of financial assets [line items]    
Percentage of basis used to calculate interest rate 12.64%  
Public Securities - Instituto de Crédito Oficial (ICO) | Country of domicile    
Disclosure of financial assets [line items]    
Marketable Securities R$ 652,388 R$ 633,428