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Loan and Lease Operations Portfolio - Summary of Loan Operations and Lease Operations by Maturity (Detail) - BRL (R$)
R$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of loans and lease operations [Line Items]    
Loan operations and lease operations by type R$ 585,791 R$ 536,091
Overdue as from 1 day [member]    
Disclosure of loans and lease operations [Line Items]    
Loan operations and lease operations by type 21,263 19,563
Falling due up to 3 months [member]    
Disclosure of loans and lease operations [Line Items]    
Loan operations and lease operations by type 165,028 144,812
Falling due from 3 months to 12 months [member]    
Disclosure of loans and lease operations [Line Items]    
Loan operations and lease operations by type 149,388 127,805
Falling due after 1 year [member]    
Disclosure of loans and lease operations [Line Items]    
Loan operations and lease operations by type R$ 250,112 R$ 243,911