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Risk and Capital Management - Summary of Internal Rating (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 822,590 | R$ 714,104
Percentage of loan operations and lease operations portfolio | 100.00% | 100.00%
Low [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 704,867 | R$ 514,635
Medium [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 58,219 | 121,442
Higher [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 8,984 | 17,374
Credit impaired [member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 50,520 | 60,653
Stage 1 [member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 702,164 | R$ 587,208
Percentage of loan operations and lease operations portfolio | 85.40% | 82.20%
Stage 1 [member] | Low [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 662,839 | R$ 501,463
Stage 1 [member] | Medium [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 38,980 | 84,193
Stage 1 [member] | Higher [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 345 | 1,552
Stage 2 [member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 69,906 | R$ 66,243
Percentage of loan operations and lease operations portfolio | 8.50% | 9.30%
Stage 2 [member] | Low [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 42,028 | R$ 13,172
Stage 2 [member] | Medium [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 19,239 | 37,249
Stage 2 [member] | Higher [Member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | 8,639 | 15,822
Stage 3 [member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 50,520 | R$ 60,653
Percentage of loan operations and lease operations portfolio | 6.10% | 8.50%
Stage 3 [member] | Credit impaired [member] |  |
Disclosure of Credit Quality [Line Items] |  |
Loan operations and lease operations portfolio | R$ 50,520 | R$ 60,653

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