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Related party transactions - Summary of transactions between related parties explanatory (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of transactions between related parties [line items]      
Assets/(Liabilities) R$ 0 R$ (3,562,079)  
Revenue/(Expenses) 6,104 (160,835) R$ (60,177)
Securities      
Disclosure of transactions between related parties [line items]      
Assets/(Liabilities) 0 238,088  
Revenue/(Expenses) 17,403 24,770 4,270
Securities purchased under agreements to resell      
Disclosure of transactions between related parties [line items]      
Assets/(Liabilities) 0 0  
Revenue/(Expenses) 5,101 9,370 19,098
Accounts receivable and Loans operations      
Disclosure of transactions between related parties [line items]      
Assets/(Liabilities) 0 476  
Revenue/(Expenses) 424 1,330 744
Securities sold under repurchase agreements      
Disclosure of transactions between related parties [line items]      
Assets/(Liabilities) 0 (3,800,643)  
Revenue/(Expenses) (16,824) (196,305) (84,268)
Borrowings      
Disclosure of transactions between related parties [line items]      
Assets/(Liabilities) 0 0  
Revenue/(Expenses) R$ 0 R$ 0 R$ (21)