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Risk and Capital Management - Summary of Assets and Liabilities According to Their Remaining Contractual Maturities, Considering Their Undiscounted Flows (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 assets and liabilities according to their remaining contractual maturities [Line Items] |  |  |
Deposits in Central Bank | R$ 91,248 | R$ 94,148 |
Securities under guarantee transactions | 8,544 | 5,120 |
Payment to merchants | 69,050 | 60,504 |
Amount of liabilities from transactions related to credit assignments | 2,451 | 3,993 |
Compulsory deposits with the Central Bank of Brazil | 2,900 | 4,689 | R$ (13,137)
Interbank deposits [member] |  |  |
Disclosure of assets and liabilities according to their remaining contractual maturities [Line Items] |  |  |
Compulsory deposits with the Central Bank of Brazil | R$ 18,938 | R$ 15,886 |

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- Definition The cash outflow to, and on behalf of, employees. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 14 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_14_d&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Disclosure of assets and liabilities according to their remaining contractual maturities [Line Items] + References No definition available. + Details
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- Definition Pledged in guarantee of operations. + References No definition available. + Details
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- Details
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