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Loan and Lease Operations Portfolio - Summary of Loan Operations and Lease Operations by Type (Parenthetical) (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of loans and lease operations [Line Items] |  |  |
Provision for Expected Loss | R$ (36,029) | R$ (33,373) |
Commitments released | (3,303) | (2,601) | R$ (3,015)
Financial guarantees pledged [member] |  |  |
Disclosure of loans and lease operations [Line Items] |  |  |
Provision for Expected Loss | R$ (837) | R$ (1,191) |

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- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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- Definition Disclosure of loans and lease operations + References No definition available. + Details
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- Definition Expected loan losses commitments released + References No definition available. + Details
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- Details
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