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Provisions - Schedule of Possible Losses (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Possible losses R$ 11,460 R$ 9,781
Labour Provision [member]    
IfrsStatementLineItems [Line Items]    
Possible losses 1,042 1,363
Customer Relations [member]    
IfrsStatementLineItems [Line Items]    
Possible losses 743 346
Other Civil Actions [member]    
IfrsStatementLineItems [Line Items]    
Possible losses 637 613
Civil Cases [member]    
IfrsStatementLineItems [Line Items]    
Possible losses 1,380 959
Provision for taxes other than income tax [member]    
IfrsStatementLineItems [Line Items]    
Possible losses 3,329 2,474
Regulatory [member]    
IfrsStatementLineItems [Line Items]    
Possible losses 3,595 3,145
Other [member]    
IfrsStatementLineItems [Line Items]    
Possible losses R$ 2,114 R$ 1,840