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Securities purchased (sold) under resale (repurchase) agreements - Additional Information (Detail) - BRL (R$) R$ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
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Summary of securities purchased under agreements to resell [Abstract] |  |  |  |  |
Investments in purchase and sale commitments, interest rate | 3.68% | 4.63% |  | 6.43% |
Securities purchased under agreements to resel | R$ 309,053 | R$ 654,057 | R$ 133,028 | R$ 488,809 | R$ 420,958
Securities sold under repurchase agreements, interest rate | 364.00% | 448.00% |  | 640.00% |

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- Definition The amount of instruments purchased for resale in reverse repurchase agreements and cash collateral on securities borrowed. [Refer: Repurchase agreements and cash collateral on securities lent] + 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 Investments in purchase and sale commitments interest rate. + References No definition available. + Details
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- Definition Securities sold under repurchase agreements, interest rate. + References No definition available. + Details
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- Definition Summary of securities purchased under agreements to resell [Abstract] + References No definition available. + Details
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