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Risk and Capital Management - Additional Information (Detail) R$ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 BRL (R$) | Dec. 31, 2018 BRL (R$) | Nov. 19, 2019 BRL (R$) | Nov. 19, 2019 USD ($)
Disclosure of financial risk and capital management [line items] |  |  |  |
Total credit and finance lease operations | R$ 260,453.0 | R$ 222,481.0 |  |
Total assets repossessed | R$ 390.0 | 657.0 |  |
VaR calculation confidence level percentage | 99.00% |  |  |
VaR calculation period | historical period of 4 years (1000 business days) |  |  |
VaR minimum horizon period in business days | 1 day |  |  |
Value at risk | R$ 278.3 | R$ 381.5 |  |
Percentage of VaR of total stockholders' equity | 0.24% | 0.29% |  |
Funds from clients | R$ 277,000.0 |  |  |
Percentage of aggregate funds from customers available on demand | 38.70% |  |  |
Liquid assets | R$ 172,900.0 |  |  |
Percentage of financial assets | 100.00% | 100.00% |  |
Subordinated debt | R$ 36,627.0 |  |  |
Capital required for market risk standardized model, percentage | 80.00% |  |  |
Market risk weighted assets | R$ 25,002.0 | R$ 22,871.0 |  |
Basel Ratio | 15.80% |  |  |
Surplus Capital in relation to the Minimum Referential Equity Required | R$ 69,292.0 |  |  |
Additional Common Equity Tier I Required (ACPRequired) | R$ 31,195.0 | R$ 19,429.0 |  |
Fixed assets commitment percenatge | 50.00% |  |  |
Fixed Asset Ratio | 27.90% |  |  |
Surplus in Relation to Fixed Assets | R$ 31,104.0 |  |  |
Increase Decrease Capital Risk Weighted Assets Ratio | 3.50% | 2.375% |  |
Basel Ratio [Member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Increase Decrease Capital Risk Weighted Assets Ratio | 2.20% |  |  |
Central Bank of Brazil [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Tier II Capital Percentage Increase | 0.60% |  |  |
International market [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Debt Instrument Face Amount 1 |  |  | R$ 3,023.0 | $ 750
Local Market [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Debt Instrument Face Amount 1 |  |  | R$ 2,330.0 |
Average [Member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Value at risk | R$ 333.7 | R$ 399.3 |  |
RWAMINT [Member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Market risk weighted assets | 25,002.0 | R$ 30,270.0 |  |
Internal credit grades [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Market risk weighted assets | R$ 22,663.0 |  |  |
Short term redeemable obligation [Member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of financial assets | 62.40% |  |  |
Funding [Member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of financial assets | 24.20% |  |  |
Total assets [Member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of financial assets | 16.60% |  |  |
IRB-Brasil Resseguros S.A. [Member] | Credit risk [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of reinsurance premiums operations | 86.02% | 78.13% |  |
IRB Brasil [member] | Credit risk [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of social security operations related to reinsurance premiums | 30.00% |  |  |
General Reinsurance AG [Member] | Credit risk [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of social security operations related to reinsurance premiums | 30.00% | 30.00% |  |
Austral [member] | Credit risk [member] |  |  |  |
Disclosure of financial risk and capital management [line items] |  |  |  |
Percentage of social security operations related to reinsurance premiums | 40.00% |  |  |

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- Definition The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 58 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_58&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph B11D -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_B11D_a&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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