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Interbank Deposits and Securities Purchased Under Agreements to Resell - Summary of Interbank Deposits and Securities Purchased Under Agreements to Resell (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of interbank deposits and securities purchased under agreements to resell [Line Items] |  |  |
Securities purchased under agreements to resell | R$ 35,883 | R$ 55,104 | R$ 49,238
Interbank deposits | 4,561 | 3,295 | R$ 15,327
Interbank deposits and securities purchased under agreements to resell [Member] |  |  |
Disclosure of interbank deposits and securities purchased under agreements to resell [Line Items] |  |  |
Securities purchased under agreements to resell | 198,422 | 280,132 |
Collateral held | 45,063 | 63,485 |
Collateral repledge | 134,116 | 170,510 |
Assets received as collateral with right to sell or repledge | 6,644 | 28,369 |
Assets received as collateral without right to sell or repledge | 127,472 | 142,141 |
Collateral sold | 19,243 | 46,137 |
Interbank deposits | 34,581 | 26,414 |
Total | 233,003 | 306,546 |
Current [member] | Interbank deposits and securities purchased under agreements to resell [Member] |  |  |
Disclosure of interbank deposits and securities purchased under agreements to resell [Line Items] |  |  |
Securities purchased under agreements to resell | 198,260 | 280,029 |
Collateral held | 44,901 | 63,392 |
Collateral repledge | 134,116 | 170,500 |
Assets received as collateral with right to sell or repledge | 6,644 | 28,369 |
Assets received as collateral without right to sell or repledge | 127,472 | 142,131 |
Collateral sold | 19,243 | 46,137 |
Interbank deposits | 31,075 | 25,726 |
Total | 229,335 | 305,755 |
Non-current [member] |  |  |
Disclosure of interbank deposits and securities purchased under agreements to resell [Line Items] |  |  |
Collateral repledge |  | 10 |
Assets received as collateral without right to sell or repledge |  | 10 |
Non-current [member] | Interbank deposits and securities purchased under agreements to resell [Member] |  |  |
Disclosure of interbank deposits and securities purchased under agreements to resell [Line Items] |  |  |
Securities purchased under agreements to resell | 162 | 103 |
Collateral held | 162 | 93 |
Interbank deposits | 3,506 | 688 |
Total | R$ 3,668 | R$ 791 |

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- Definition The fair value of collateral held that is permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 15 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_15_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Assets Held As Collateral Not Permitted To Be Sold or Repledged at Fair Value + References No definition available. + Details
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- Definition Collateral held under agreement to resell. + References No definition available. + Details
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- Definition Collateral repledge under agreement to resell. + References No definition available. + Details
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- Definition Collateral sold under agreement to resell. + References No definition available. + Details
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- Definition Interbank deposits. + References No definition available. + Details
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- Definition Interbank deposits and securities purchased under agreements to resell. + References No definition available. + Details
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