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Risk and Capital Management - Maximum Exposure of Other financial assets Segregated by Business Sector (Detail) - BRL (R$) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of credit risk exposure [line items] |  |
Other financial assets | R$ 765,719,000,000 | R$ 752,920,000,000
Other financial assets percentage | 100.00% | 100.00%
Public sector [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Other financial assets | R$ 562,485,000,000 | R$ 580,392,000,000
Other financial assets percentage | 73.50% | 77.10%
Services [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Other financial assets | R$ 59,193,000,000 | R$ 62,383,000,000
Other financial assets percentage | 7.70% | 8.30%
Other sectors [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Other financial assets | R$ 45,744,000,000 | R$ 28,649,000,000
Other financial assets percentage | 6.00% | 3.80%
Financial [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Other financial assets | R$ 98,297,000,000 | R$ 81,496,000,000
Other financial assets percentage | 12.80% | 10.80%

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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