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Loan and Lease Operations - Summary of Loan Operations and Lease Operations by Concentration (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Largest debtor [member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by concentration | R$ 6,414 | R$ 7,243
10 largest debtors [member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by concentration | 33,694 | 37,863
20 largest debtors [member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by concentration | 49,541 | 54,812
50 largest debtors [member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by concentration | 79,403 | 83,438
100 largest debtors [member] |  |
Disclosure of loans and lease operations [Line Items] |  |
Loan operations and lease operations by concentration | R$ 111,116 | R$ 112,333

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