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Derivatives (Details 8) - BRL (R$)
R$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Gross amount of recognized financial assets R$ 78,208 R$ 69,045
Net amount of financial assets presented in the statement of financial position 78,208 69,045
Related amounts not offset in the statement of Financial position, financial instruments (17,507) (14,517)
Net amount 59,696 54,311
Related amounts not offset in the statement of Financial position, cash collateral received (1,005) (217)
Gross amount of recognized financial liabilities 76,861 63,204
Net amount of financial assets presented in the statement of financial position 76,861 63,204
Related amounts not offset in the statement of Financial position, financial instruments (17,507) (14,517)
Net amount 59,354 48,687
Securities purchased under agreements to resell [Member]    
IfrsStatementLineItems [Line Items]    
Gross amount of recognized financial assets 221,776 169,711
Net amount of financial assets presented in the statement of financial position 221,776 169,711
Related amounts not offset in the statement of Financial position, financial instruments (3,930) (3,649)
Net amount 217,846 166,062
Gross amount of recognized financial liabilities 293,440 252,848
Net amount of financial assets presented in the statement of financial position 293,440 252,848
Related amounts not offset in the statement of Financial position, financial instruments (40,156) (39,317)
Net amount R$ 253,284 R$ 213,531