v3.26.1
Financial risk management (Details 1) - BRL (R$)
R$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 107.00% 108.00%  
Financial investments R$ 590,014 R$ 487,924  
Banking Issuances 28,427,994 R$ 24,089,234 R$ 16,188,440
Deposits [Member]      
Disclosure of credit risk exposure [line items]      
Banking Issuances 16,401,956    
Certificate of Deposit - related party [Member]      
Disclosure of credit risk exposure [line items]      
Certificate of Deposit - related party 728,300    
Interbank deposits      
Disclosure of credit risk exposure [line items]      
Interbank deposit 12,026,038    
Short-term investments member [Member]      
Disclosure of credit risk exposure [line items]      
Short-term investment 588,259    
Financial Investments [Member]      
Disclosure of credit risk exposure [line items]      
Financial investments 590,014    
Compulsory reserve [Member]      
Disclosure of credit risk exposure [line items]      
Compulsory reserve 4,271,581    
Bank accounts [Member]      
Disclosure of credit risk exposure [line items]      
Corporate securities 12,243,699    
Borrowings [Member]      
Disclosure of credit risk exposure [line items]      
Balances with banks 2,436,846    
Current Obligations to FIDC quota holders [Member]      
Disclosure of credit risk exposure [line items]      
Obligations to FIDC quota holders - Interest risk R$ 1,171,463    
Interest rate risk | Deposits [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 103.00%    
Interest rate risk | Certificate of Deposit - related party [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 105.00%    
Interest rate risk | Interbank deposits      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 107.00%    
Interest rate risk | Short-term investments member [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 100.00%    
Interest rate risk | Financial Investments [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 100.00%    
Interest rate risk | Compulsory reserve [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 100.00%    
Interest rate risk | Bank accounts [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 46.00%    
Interest rate risk | Borrowings [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 105.00%    
Interest rate risk | Current Obligations to FIDC quota holders [Member]      
Disclosure of credit risk exposure [line items]      
Basis of interest rate risk exposure to CDI (percent) 107.00%    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk      
Disclosure of credit risk exposure [line items]      
Probable scenario for future interest rate (percent) 14.90%    
Risk exposure associated with instruments sharing characteristic R$ (5,143,626)    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Deposits [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (2,517,208)    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Certificate of Deposit - related party [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (113,942)    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Interbank deposits      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (1,917,311)    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Short-term investments member [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 87,651    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Financial Investments [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 87,912    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Compulsory reserve [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 636,466    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Bank accounts [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (839,183)    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Borrowings [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (381,245)    
Scenario with maintaining of CDI (14.90%) [Member] | Interest rate risk | Current Obligations to FIDC quota holders [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic R$ (186,766)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk      
Disclosure of credit risk exposure [line items]      
Probable scenario for future interest rate (percent) 12.15%    
Risk exposure associated with instruments sharing characteristic R$ (4,194,301)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Deposits [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (2,052,623)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Certificate of Deposit - related party [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (92,913)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Interbank deposits      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (1,563,445)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Short-term investments member [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 71,473    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Financial Investments [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 71,687    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Compulsory reserve [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 518,997    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Bank accounts [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (684,300)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Borrowings [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (310,881)    
Probable scenario with decrease of CDI 12.15% [Member] | Interest rate risk | Current Obligations to FIDC quota holders [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic R$ (152,296)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk      
Disclosure of credit risk exposure [line items]      
Probable scenario for future interest rate (percent) 13.90%    
Risk exposure associated with instruments sharing characteristic R$ (4,798,418)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Deposits [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (2,348,268)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Certificate of Deposit - related party [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (106,295)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Interbank deposits      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (1,788,633)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Short-term investments member [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 81,768    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Financial Investments [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 82,012    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Compulsory reserve [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic 593,750    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Bank accounts [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (782,862)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Borrowings [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic (355,658)    
Simulated scenario with decrease to 13.90% [Member] | Interest rate risk | Current Obligations to FIDC quota holders [Member]      
Disclosure of credit risk exposure [line items]      
Risk exposure associated with instruments sharing characteristic R$ (174,232)