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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 2) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss R$ 34,173 R$ 16,678 R$ 6,553
Derivatives [member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss 3,477 9,716 (9,393)
Financial Assets Designated At Fair Value Through Profit Or Loss Equity Securities [Member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss 660 (483) (118)
Financial liabilities at fair value through profit or loss, category [member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss     (9)
Securities [member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss 29,730 7,439 16,035
Other Financial Assets at Fair Value Through Profit or Loss [Member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss 1,800 838  
Financial liabilities at fair value through profit or loss, category [member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss (1,535) (843)  
Financial Liability Designated At Fair Value [Member]      
IfrsStatementLineItems [Line Items]      
Income of financial assets and liabilities at fair value through profit or loss R$ 41 R$ 11 R$ 38