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Segment Information - Summary of Result of Non-Current Assets and Main Services and Products by Geographic Region (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of geographical areas [line items] |  |  |
Non-current assets | R$ 28,073 | R$ 24,267 |
Income related to financial operations | 144,514 | 123,611 | R$ 145,308
Income related to insurance and private pension operations before claim and selling expenses | 5,354 | 4,488 | 4,553
Commissions and Banking Fees | 42,324 | 38,557 | 39,032
Brazil [Member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Non-current assets | 21,390 | 17,095 |
Income related to financial operations | 107,741 | 102,016 | 117,541
Income related to insurance and private pension operations before claim and selling expenses | 5,332 | 4,488 | 4,423
Commissions and Banking Fees | 37,635 | 34,533 | 35,283
Abroad [Member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Non-current assets | 6,683 | 7,172 |
Income related to financial operations | 36,773 | 21,595 | 27,767
Income related to insurance and private pension operations before claim and selling expenses | 22 | 0 | 130
Commissions and Banking Fees | R$ 4,689 | R$ 4,024 | R$ 3,749

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