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Securities Sold Under Repurchase Agreements and Interbank and Institutional Market Funds - Summary of Interbank Market Debt (Detail) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 174,862 | R$ 134,670
Financial credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 65,433 | 37,928
Financial credit bills [member] | Bottom of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 4.94% |
Financial credit bills [member] | Top of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 17.68% |
Real estate credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 12.22% |
Interbank market funds | R$ 7,635 | 9,546
Agribusiness credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 21,204 | 18,013
Agribusiness credit bills [member] | Bottom of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 4.56% |
Agribusiness credit bills [member] | Top of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 15.00% |
Guaranteed real state notes [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 4,320 | 1,227
Guaranteed real state notes [member] | Bottom of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 96.00% |
Guaranteed real state notes [member] | Top of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 99.50% |
Import and export financing [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 64,622 | 50,050
Import and export financing [member] | Bottom of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 0.00% |
Import and export financing [member] | Top of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 9.60% |
On-lending - domestic [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 11,648 | 17,906
On-lending - domestic [member] | Bottom of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 0.00% |
On-lending - domestic [member] | Top of range [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Percentage of interest on interbank market debt | 19.79% |
Current [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 110,017 | 73,176
Current [member] | Financial credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 20,829 | 9,139
Current [member] | Real estate credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 6,194 | 6,465
Current [member] | Agribusiness credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 14,543 | 9,586
Current [member] | Import and export financing [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 60,530 | 42,685
Current [member] | On-lending - domestic [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 7,921 | 5,301
Non-current [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 64,845 | 61,494
Non-current [member] | Financial credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 44,604 | 28,789
Non-current [member] | Real estate credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 1,441 | 3,081
Non-current [member] | Agribusiness credit bills [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 6,661 | 8,427
Non-current [member] | Guaranteed real state notes [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 4,320 | 1,227
Non-current [member] | Import and export financing [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | 4,092 | 7,365
Non-current [member] | On-lending - domestic [member] |  |
Disclosure Of Repurchase Agreements [Line Items] |  |
Interbank market funds | R$ 3,727 | R$ 12,605

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