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Risk and Capital Management (Details 9) - BRL (R$)
R$ in Millions
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Value at risk R$ 1,743 R$ 1,094
Interest rate risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 2,009 1,408
Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 50 20
Equity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 46 41
Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 19 7
Risk diversification effect [member]    
IfrsStatementLineItems [Line Items]    
Value at risk (381) (382)
Average [Member]    
IfrsStatementLineItems [Line Items]    
Value at risk 939 931
Average [Member] | Interest rate risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 1,179 1,251
Average [Member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 36 29
Average [Member] | Equity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 51 30
Average [Member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 17 12
Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 756 718
Bottom of range [member] | Interest rate risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 988 1,059
Bottom of range [member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 18 12
Bottom of range [member] | Equity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 35 14
Bottom of range [member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 8 2
Top of range [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 1,902 1,247
Top of range [member] | Interest rate risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 2,120 1,585
Top of range [member] | Currency risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 64 74
Top of range [member] | Equity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk 86 55
Top of range [member] | Commodity price risk [member]    
IfrsStatementLineItems [Line Items]    
Value at risk R$ 41 R$ 33