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Risk and Capital Management- Summary of VaR Total - Historical Simulation (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | R$ 696 | R$ 223
Interest rate risk [Member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 1,257 | 431
Foreign exchange risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 13 | 24
Shares [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 24 | 30
Commodity price risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 4 | 1
Risk diversification effect [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | (602) | (263)
Average [Member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 441 | 282
Average [Member] | Interest rate risk [Member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 937 | 614
Average [Member] | Foreign exchange risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 18 | 20
Average [Member] | Shares [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 42 | 23
Average [Member] | Commodity price risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 4 | 2
Bottom of range [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 198 | 166
Bottom of range [member] | Interest rate risk [Member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 1,411 | 1,961
Bottom of range [member] | Foreign exchange risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 10 | 9
Bottom of range [member] | Shares [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 17 | 9
Bottom of range [member] | Commodity price risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 1 | 1
Top of range [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 707 | 763
Top of range [member] | Interest rate risk [Member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 425 | 292
Top of range [member] | Foreign exchange risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 37 | 71
Top of range [member] | Shares [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | 98 | 49
Top of range [member] | Commodity price risk [member] |  |
Disclosure of Value at Risk historical simulation [Line Items] |  |
Risk factor group | R$ 8 | R$ 4

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- Definition The measure of a potential loss exposure as a result of future market movements, based on a specified confidence interval and measurement horizon. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 41 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_41&doctype=Standard -URIDate 2021-03-24 + Details
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