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Loan Operations and Lease Operations Portfolio - Summary of Loan Operations and Lease Operations by Maturity (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by type | R$ 536,091 | R$ 497,719
Overdue as from 1 day [Member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by type | 19,563 | 21,974
Falling due up to 3 months [Member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by type | 144,812 | 127,402
Falling due more than 3 months but less than 1 year [Member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by type | 127,805 | 116,089
Falling due after 1 year [Member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by type | R$ 243,911 | R$ 232,254

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