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Risk and Capital Management (Details) - BRL (R$)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Financial Asset  
Financial guarantee contracts [member]    
IfrsStatementLineItems [Line Items]    
Expected credit loss R$ 810,000,000 767,000,000
Loan commitments [member]    
IfrsStatementLineItems [Line Items]    
Expected credit loss 2,874,000,000 4,433,000,000
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member]    
IfrsStatementLineItems [Line Items]    
Financial Asset 1,256,751,000,000  
Expected credit loss (54,476,000,000) (46,348,000,000)
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Loan And Lease Operations And Other Securities [Member]    
IfrsStatementLineItems [Line Items]    
Financial assets   1,078,891
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Pessimistic Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Expected Increase Decrease In Expected Credit Loss (530,000,000) (340,000,000)
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Base Case Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Expected Increase Decrease In Expected Credit Loss 198,000,000 163,000,000
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Optimistic Scenario [Member]    
IfrsStatementLineItems [Line Items]    
Expected Increase Decrease In Expected Credit Loss R$ 530,000,000 R$ 1,788,000,000