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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) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Interest and similar income R$ 190,273 R$ 129,253 R$ 114,369
Compulsory Deposits In The Central Bank Of Brazil [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income 10,228 3,613 2,242
Interbank Deposits [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income 3,145 1,203 1,102
Securities purchased under agreements to resell [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income 25,467 9,812 9,832
Financial assets at fair value through other comprehensive income, category [member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income 21,313 17,193 18,089
Financial assets at amortised cost, category [member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income 12,164 4,820 3,629
Loans Operations [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income 116,844 92,789 79,503
Other financial asset [Member]      
IfrsStatementLineItems [Line Items]      
Interest and similar income R$ 1,112 R$ (177) R$ (28)