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Risk and Capital Management (Details 16)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
BRL (R$)
Impact In Income Private Pension [Member]  
IfrsStatementLineItems [Line Items]  
Discount rate increase R$ (28)
Discount rate decrease 24
Biometric tables increase 51
Biometric tables decrease (53)
Impact In Stockholders Equity Insurance [Member]  
IfrsStatementLineItems [Line Items]  
Discount rate increase 49
Discount rate decrease (53)
Impact In Stockholders Equity Private Pension [Member]  
IfrsStatementLineItems [Line Items]  
Discount rate increase 653
Discount rate decrease (722)
Impact In Income Insurance [Member]  
IfrsStatementLineItems [Line Items]  
Biometric tables increase (10)
Biometric tables decrease 11
Insurance [Member]  
IfrsStatementLineItems [Line Items]  
Claims rates increase (32)
Claims rates decrease R$ 32