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Hedge accounting (Details Narrative) - BRL (R$)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Description of type of hedge There are three types of hedge relations: Fair value hedge, Cash flow hedge and Hedge of net investment in foreign operations.  
Risk factor designated coverage ratio 100.00%  
Balance reserve in cash flow hedge for which hedge accounting is no longer applied R$ 187,000,000 R$ 555,000,000
Reversal of hedging 7,049,000,000 11,752,000,000
Foreign currency conversion reserve R$ (3,116,000,000) (5,265,000,000)
Fair value of hedge securities, other comprehensive income   125
Cash flow hedges [member]    
IfrsStatementLineItems [Line Items]    
Reversal of hedging   R$ 8,001