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Risk and Capital Management (Details 3) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Other financial assets R$ 1,396,543 R$ 1,247,113
Other financial assets percentage 100.00% 100.00%
Public Sector [Member]    
IfrsStatementLineItems [Line Items]    
Other financial assets R$ 871,579 R$ 831,963
Other financial assets percentage 62.40% 66.70%
Services [Member]    
IfrsStatementLineItems [Line Items]    
Other financial assets R$ 196,419 R$ 150,100
Other financial assets percentage 14.10% 12.00%
Other Sectors [Member]    
IfrsStatementLineItems [Line Items]    
Other financial assets R$ 181,722 R$ 145,163
Other financial assets percentage 13.00% 11.70%
Financial [Member]    
IfrsStatementLineItems [Line Items]    
Other financial assets R$ 146,823 R$ 119,887
Other financial assets percentage 10.50% 9.60%