Business development	12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]
Business development	Note 3 - Business development Banco Itaú Chile ITAÚ UNIBANCO HOLDING began controlling Banco Itaú Chile (ITAÚ CHILE) on April 1st, 2016, after the execution of a shareholders’ agreement with Corp Group. In July 2022, the shareholders’ agreement was fully terminated and ITAÚ UNIBANCO HOLDING, after a series of corporate events, now holds 65.62% of ITAÚ CHILE’s capital. During 2023, ITAÚ UNIBANCO HOLDING, through its subsidiary ITB Holding Brasil Participações Ltda., acquired a total of 3,707,104 shares and 554,650 ADS (equivalent to 184,883 shares), including through the voluntary offering for the acquisition of shares, for the total amount of R$ 193 (CLP 33,012 million), then holding 67.42% of ITAÚ CHILE’s capital. Acquisition of Ideal Holding Financeira S.A. On January 13, 2022, ITAÚ UNIBANCO HOLDING, through its subsidiary Itaú Corretora de Valores S.A., entered into a purchase and sale agreement of up to 100% of capital of Ideal Holding Financeira S.A. (IDEAL). The purchase will be carried out in two phases over five years. In the first phase, ITAÚ UNIBANCO HOLDING acquired 50.1% of IDEAL’s total voting capital for R$ 700, starting to hold control of the company. In the second phase, after five years, ITAÚ UNIBANCO HOLDING may exercise the right to purchase the remaining ownership interest, in order to reach 100% of IDEAL’s capital. IDEAL is a 100% digital broker and currently offers electronic trading and DMA (direct market access) solutions, within a flexible and cloud-based platform. The management and development of IDEAL's business will continue to be autonomous in relation to ITAÚ UNIBANCO HOLDING, according to the terms and conditions of the Shareholders' Agreement for this transaction and ITAÚ UNIBANCO HOLDING will not have exclusivity in the provision of services. The effective acquisitions and financial settlements occured on March 31, 2023, after the required regulatory approvals are received. Zup I.T. Serviços em Tecnologia e Inovação S.A. On October 31, 2019, ITAÚ UNIBANCO HOLDING, through its subsidiary Redecard Instituição de Pagamento S.A. (REDE), entered into a purchase and sale agreement for 100% of Zup I.T. Serviços em Tecnologia e Inovação S.A.'s (ZUP) capital in three phases, and the first phase, was performed in March 2020, granted control to ITAÚ UNIBANCO HOLDING. In 2023, ITAÚ UNIBANCO HOLDING increased its ownership interest by 20.57% (2,228,342 shares) for the amount of R$ 199, then holding 72.51%. In 2024, there was a dilution of 1.32% (issuance of 200,628 new shares) in the ownership interest of ITAÚ UNIBANCO HOLDING and the completion of the third stage, with the acquisition of the remaining ownership interest of 28.81% (3,178,623 shares) in the ZUP's capital for the amount of R$ 312. The effective acquisitions occurred on May 31, 2023, June 14, 2023 and March 28, 2024. Totvs Techfin S.A. On April 12, 2022, ITAÚ UNIBANCO HOLDING, through its subsidiary Itaú Unibanco S.A., with TOTVS S.A. (TOTVS) entered into an agreement for the organization of a joint venture, called Totvs Techfin S.A. (TECHFIN), which combined technology and financial solutions, adding the supplementary expertise of the partners to provide corporate clients with, in an expeditious and integrated manner, the best experiences in buying products directly from the platforms already offered by TOTVS. TOTVS contributed with assets of its current TECHFIN operation to a company of which ITAÚ UNIBANCO HOLDING became a partner with a 50% ownership interest in capital, and each partner may appoint half of the members of the Board of Directors and the Executive Board. For the ownership interest, ITAÚ UNIBANCO HOLDING paid TOTVS the amount of R$ 610 and, as a complementary price (earn-out), it will pay up to R$ 450 after five years upon achievement of goals aligned with the growth and performance purposes. Additionally, ITAÚ UNIBANCO HOLDING will contribute the funding commitment for current and future operations, credit expertise and development of new products at TECHFIN. The effective acquisition and financial settlement occurred on July 31, 2023, after the required regulatory approvals. Banco Itaú Argentina S.A. After obtaining the authorization of the Central Bank of the Argentine Republic on November 2, 2023, ITAÚ UNIBANCO HOLDING, through Itaú Unibanco S.A., consummated the operation for disposing of the totality of their shares held in Banco Itaú Argentina S.A. and its controlled companies to Banco Macro S.A. On November 3, 2023, ITAÚ UNIBANCO HOLDING received from Banco Macro S.A., for the completion of the transaction, the approximate amount of R$ 253 (US$ 50 million), thus generating an impact on the result of the third quarter of 2023 of R$ (1,211). Avenue Holding Cayman Ltd On July 08, 2022, ITAÚ UNIBANCO HOLDING entered into a share purchase agreement with Avenue Controle Cayman Ltd and other selling stockholders for the acquisition of control of Avenue Holding Cayman Ltd (AVENUE). The purchase will be carried out in three phases over five years. In the first phase, ITAÚ UNIBANCO HOLDING, through its subsidiary ITB Holding Brasil Participações Ltda., acquired 35% of AVENUE’s capital, which became a joint venture, for approximately R$ 563. In the second phase, in the 4th quarter of 2025, ITAÚ UNIBANCO HOLDING will acquire additional ownership equivalent to control with 50.1% of AVENUE’s capital. After five years of the first phase, ITAÚ UNIBANCO HOLDING may exercise a call option for the remaining ownership interest. AVENUE holds a U.S. digital securities broker aimed to democratize the access of Brazilian investors to the international market. Regulatory approvals were completed on October 31, 2023, and the process for the acquisition and financial settlement occurred on November 30, 2023. In August 2024, AVENUE issued new shares which resulted in the reduction of ITAÚ UNIBANCO HOLDING’s ownership interest to 33.6% in AVENUE’s capital.

Business development

12 Months Ended

Dec. 31, 2024

Notes and other explanatory information [abstract]

Note 3 - Business development

Banco Itaú Chile

ITAÚ UNIBANCO HOLDING began controlling Banco Itaú Chile (ITAÚ CHILE) on April 1st, 2016, after the execution of a shareholders’ agreement with Corp Group. In July 2022, the shareholders’ agreement was fully terminated and ITAÚ UNIBANCO HOLDING, after a series of corporate events, now holds 65.62% of ITAÚ CHILE’s capital.

During 2023, ITAÚ UNIBANCO HOLDING, through its subsidiary ITB Holding Brasil Participações Ltda., acquired a total of 3,707,104 shares and 554,650 ADS (equivalent to 184,883 shares), including through the voluntary offering for the acquisition of shares, for the total amount of R$ 193 (CLP 33,012 million), then holding 67.42% of ITAÚ CHILE’s capital.

Acquisition of Ideal Holding Financeira S.A.

On January 13, 2022, ITAÚ UNIBANCO HOLDING, through its subsidiary Itaú Corretora de Valores S.A., entered into a purchase and sale agreement of up to 100% of capital of Ideal Holding Financeira S.A. (IDEAL). The purchase will be carried out in two phases over five years. In the first phase, ITAÚ UNIBANCO HOLDING acquired 50.1% of IDEAL’s total voting capital for R$ 700, starting to hold control of the company. In the second phase, after five years, ITAÚ UNIBANCO HOLDING may exercise the right to purchase the remaining ownership interest, in order to reach 100% of IDEAL’s capital.

IDEAL is a 100% digital broker and currently offers electronic trading and DMA (direct market access) solutions, within a flexible and cloud-based platform.

The management and development of IDEAL's business will continue to be autonomous in relation to ITAÚ UNIBANCO HOLDING, according to the terms and conditions of the Shareholders' Agreement for this transaction and ITAÚ UNIBANCO HOLDING will not have exclusivity in the provision of services.

The effective acquisitions and financial settlements occured on March 31, 2023, after the required regulatory approvals are received.

Zup I.T. Serviços em Tecnologia e Inovação S.A.

On October 31, 2019, ITAÚ UNIBANCO HOLDING, through its subsidiary Redecard Instituição de Pagamento S.A. (REDE), entered into a purchase and sale agreement for 100% of Zup I.T. Serviços em Tecnologia e Inovação S.A.'s (ZUP) capital in three phases, and the first phase, was performed in March 2020, granted control to ITAÚ UNIBANCO HOLDING.

In 2023, ITAÚ UNIBANCO HOLDING increased its ownership interest by 20.57% (2,228,342 shares) for the amount of R$ 199, then holding 72.51%.

In 2024, there was a dilution of 1.32% (issuance of 200,628 new shares) in the ownership interest of ITAÚ UNIBANCO HOLDING and the completion of the third stage, with the acquisition of the remaining ownership interest of 28.81% (3,178,623 shares) in the ZUP's capital for the amount of R$ 312.

The effective acquisitions occurred on May 31, 2023, June 14, 2023 and March 28, 2024.

Totvs Techfin S.A.

On April 12, 2022, ITAÚ UNIBANCO HOLDING, through its subsidiary Itaú Unibanco S.A., with TOTVS S.A. (TOTVS) entered into an agreement for the organization of a joint venture, called Totvs Techfin S.A. (TECHFIN), which combined technology and financial solutions, adding the supplementary expertise of the partners to provide corporate clients with, in an expeditious and integrated manner, the best experiences in buying products directly from the platforms already offered by TOTVS.

TOTVS contributed with assets of its current TECHFIN operation to a company of which ITAÚ UNIBANCO HOLDING became a partner with a 50% ownership interest in capital, and each partner may appoint half of the members of the Board of Directors and the Executive Board. For the ownership interest, ITAÚ UNIBANCO HOLDING paid TOTVS the amount of R$ 610 and, as a complementary price (earn-out), it will pay up to R$ 450 after five years upon achievement of goals aligned with the growth and performance purposes. Additionally, ITAÚ UNIBANCO HOLDING will contribute the funding commitment for current and future operations, credit expertise and development of new products at TECHFIN.

The effective acquisition and financial settlement occurred on July 31, 2023, after the required regulatory approvals.

Banco Itaú Argentina S.A.

After obtaining the authorization of the Central Bank of the Argentine Republic on November 2, 2023, ITAÚ UNIBANCO HOLDING, through Itaú Unibanco S.A., consummated the operation for disposing of the totality of their shares held in Banco Itaú Argentina S.A. and its controlled companies to Banco Macro S.A.

On November 3, 2023, ITAÚ UNIBANCO HOLDING received from Banco Macro S.A., for the completion of the transaction, the approximate amount of R$ 253 (US$ 50 million), thus generating an impact on the result of the third quarter of 2023 of R$ (1,211).

Avenue Holding Cayman Ltd

On July 08, 2022, ITAÚ UNIBANCO HOLDING entered into a share purchase agreement with Avenue Controle Cayman Ltd and other selling stockholders for the acquisition of control of Avenue Holding Cayman Ltd (AVENUE). The purchase will be carried out in three phases over five years. In the first phase, ITAÚ UNIBANCO HOLDING, through its subsidiary ITB Holding Brasil Participações Ltda., acquired 35% of AVENUE’s capital, which became a joint venture, for approximately R$ 563. In the second phase, in the 4th quarter of 2025, ITAÚ UNIBANCO HOLDING will acquire additional ownership equivalent to control with 50.1% of AVENUE’s capital. After five years of the first phase, ITAÚ UNIBANCO HOLDING may exercise a call option for the remaining ownership interest.

AVENUE holds a U.S. digital securities broker aimed to democratize the access of Brazilian investors to the international market.

Regulatory approvals were completed on October 31, 2023, and the process for the acquisition and financial settlement occurred on November 30, 2023.

In August 2024, AVENUE issued new shares which resulted in the reduction of ITAÚ UNIBANCO HOLDING’s ownership interest to 33.6% in AVENUE’s capital.