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v3.20.1

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, 2019 BRL (R$) | Dec. 31, 2018 BRL (R$)
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 17,712 | R$ 17,015
DV01 |  | 0
Indexed to PRE [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
DV01 |  | 0.01
Under agreements to resell [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
DV01 |  | 0
BTU [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 152 | R$ 179
DV01 | 0.04 | 0.08
PDBC [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 0 | R$ 77
DV01 | 0 | 0.02
Indexed to CLP [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 79 | R$ 128
DV01 |  | 0
Indexed to CLF [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | 6 | R$ 10
DV01 |  | 0
Indexed to DOLLAR [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | 0 | R$ 2
DV01 |  | 0
Shares [member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | 6 |
DV01 |  | 0
Postfixed assets [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | 2,297 | R$ 2,043
DV01 |  | 0
Currency, commodities, and ratios [Member] | NTN-C [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 5,495 | R$ 5,096
DV01 | (2.57) | (2.52)
Currency, commodities, and ratios [Member] | NTN-B [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 8,675 | R$ 6,069
DV01 | (9.42) | (7.77)
Currency, commodities, and ratios [Member] | Indexed to IPCA [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 83 | R$ 130
DV01 | (0.01) | (0.03)
Currency, commodities, and ratios [Member] | Indexed to PRE [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 142 | R$ 4
Currency, commodities, and ratios [Member] | Under agreements to resell [Member] |  |
Disclosure of sensitivity analysis market risk [Line Items] |  |
Account balance | R$ 777 | R$ 3,277

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