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Risk and Capital Management - Summary of Sensitivity Analysis Presented in Relation to Insurance Operations Demonstrate Impact on Cash Flows Market Value (Detail) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 BRL (R$) | Dec. 31, 2020 BRL (R$)
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 20,924 | R$ 19,010
NTN-C [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 5,154 | R$ 7,025
DV01 | (3.05) | (3.11)
NTN-B [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 6,094 | R$ 5,215
DV01 | (6.24) | (5.42)
NTNF [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 205 | R$ 134
DV01 | (0.11) | (0.08)
LTN [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 166 | R$ 2,098
DV01 | (0.01) | (0.31)
Indexed to IPCA [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 355 | R$ 22
DV01 | (0.36) | (0.01)
Indexed to PRE [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 23 | R$ 85
DV01 | 0 | 0
Indexed to CLP [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 7 | R$ 0
DV01 | (0.02) | 0
Indexed to CLF [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 30 | R$ 0
DV01 | (0.01) | 0
Shares [member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 947 | R$ 1,320
DV01 | 9 | 13
Postfixed assets [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 6,048 | R$ 2,414
DV01 | 0 | 0
Under agreements to resell [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 1,895 | R$ 697
DV01 | 0 | 0

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