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Risk and Capital Management - Maximum Exposure of Loan Operations and Lease Operations Portfolio Segregated By Business Sector (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of credit risk exposure [line items] |  |
Loan operations and lease operations portfolio | R$ 822,590 | R$ 714,104
Loan operations and lease operations percentage | 100.00% | 100.00%
Industry and commerce [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Loan operations and lease operations portfolio | R$ 190,491 | R$ 163,784
Loan operations and lease operations percentage | 23.10% | 22.90%
Services [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Loan operations and lease operations portfolio | R$ 173,332 | R$ 172,322
Loan operations and lease operations percentage | 21.10% | 24.10%
Other sectors [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Loan operations and lease operations portfolio | R$ 37,652 | R$ 37,565
Loan operations and lease operations percentage | 4.60% | 5.30%
Individuals [member] |  |
Disclosure of credit risk exposure [line items] |  |
Loan operations and lease operations portfolio | R$ 421,115 | R$ 340,433
Loan operations and lease operations percentage | 51.20% | 47.70%

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