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Loan and Lease Operations - Summary Securitization or Transfer of Financial Assets (Detail) - BRL (R$)
R$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of loans and lease operations [Line Items]    
Assets R$ 1,915,573 R$ 1,851,322
Liabilities 1,621,786 1,579,686
Book value [member]    
Disclosure of loans and lease operations [Line Items]    
Assets 1,035 1,646
Liabilities [1] 1,030 1,657
Book value [member] | Mortgages [member]    
Disclosure of loans and lease operations [Line Items]    
Assets 235 349
Liabilities [1] 235 347
Book value [member] | Working capital [member]    
Disclosure of loans and lease operations [Line Items]    
Assets 800 1,297
Liabilities [1] 795 1,310
Estimated fair value [member]    
Disclosure of loans and lease operations [Line Items]    
Assets 1,035 1,665
Liabilities [1] 1,029 1,674
Estimated fair value [member] | Mortgages [member]    
Disclosure of loans and lease operations [Line Items]    
Assets 235 366
Liabilities [1] 234 362
Estimated fair value [member] | Working capital [member]    
Disclosure of loans and lease operations [Line Items]    
Assets 800 1,299
Liabilities [1] R$ 795 R$ 1,312
[1] Under Other liabilities.