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Risk and Capital Management - Summary of Financial Assets Individually Evaluated Classified by Rating (Parenthetical) (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of financial assets individually evaluated classified by rating[Abstract] |  |
Derivatives | R$ 41,854 | R$ 23,466

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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Disclosure of financial assets individually evaluated classified by rating + References No definition available. + Details
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