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Interest and similar income and expenses and income of financial assets and liabilities at fair value through profit or loss (Details 1) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Interest and similar expense R$ (138,515) R$ (69,305) R$ (73,558)
Bank Deposits [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar expense (52,358) (20,492) (17,478)
Securities sold under repurchase agreements [member]      
IfrsStatementLineItems [Line Items]      
Interest and similar expense (28,399) (8,635) (10,690)
Inter Bank Market Debt [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar expense (22,878) (24,929) (28,878)
Institutional Market Debt [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar expense (12,757) (9,865) (8,400)
Finance Expense [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar expense (21,981) (5,346) (8,121)
Other interest and similar expense [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar expense R$ (142) R$ (38) R$ 9