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v3.19.1

Risk and Capital Management - Summary of Funding from Clients (Detail) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
Disclosure of Sources of Funding [Line Items] |  |  |
Deposits | R$ 463,424 | R$ 402,938 | R$ 329,414
Subordinated debt | 35,205 |  |
Total | R$ 253,000 |  |
Percentage of funding from clients | 100.00% | 100.00% |
ITAU UNIBANCO HOLDING [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Deposits | R$ 463,424 | R$ 402,938 |
Demand deposits | 72,581 | 68,973 |
Savings deposits | 136,865 | 119,980 |
Time deposits | 251,300 | 211,800 |
Other | 2,678 | 2,185 |
Funds from acceptances and issuance of securities | 111,566 | 107,581 |
Funds from own issue | 21,417 | 58,837 |
Subordinated debt | 49,313 | 52,696 |
Total | 645,720 | 622,052 |
0-30 days [Member] | ITAU UNIBANCO HOLDING [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Deposits | 248,913 | 216,842 |
Demand deposits | 72,581 | 68,973 |
Savings deposits | 136,865 | 119,980 |
Time deposits | 37,784 | 27,798 |
Other | 1,683 | 91 |
Funds from acceptances and issuance of securities | 2,285 | 6,820 |
Funds from own issue | 1,831 | 2,570 |
Subordinated debt | 2 | 1,315 |
Total | 253,031 | 227,547 |
Demand deposits [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Deposits | R$ 72,581 | R$ 68,973 |
Percentage of funding from clients | 11.20% | 11.10% |
Savings deposits [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Percentage of funding from clients | 21.20% | 19.30% |
Time deposits [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Deposits | R$ 251,300 | R$ 211,800 |
Percentage of funding from clients | 38.90% | 34.00% |
Other [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Deposits | R$ 3 | R$ 3 |
Percentage of funding from clients | 0.40% | 0.40% |
Security Deposits [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Percentage of funding from clients | 17.30% | 17.30% |
Issued debt [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Percentage of funding from clients | 3.30% | 9.50% |
Subordinated debt [Member] |  |  |
Disclosure of Sources of Funding [Line Items] |  |  |
Percentage of funding from clients | 7.60% | 8.50% |

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