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v3.25.1

Consolidated Statement of Changes in Stockholders' Equity - BRL (R$) R$ in Millions | Issued capital [member] | Issued capital [member] IFRS 17 [member] | Treasury shares [member] | Treasury shares [member] IFRS 17 [member] | Capital Reserves [Member] | Capital Reserves [Member] IFRS 17 [member] | Profit Reserve [Member] | Profit Reserve [Member] IFRS 17 [member] | Retained earnings [member] | Retained earnings [member] IFRS 17 [member] | Reserve of gains and losses on financial assets measured at fair value through other comprehensive income [member] | Reserve of gains and losses on financial assets measured at fair value through other comprehensive income [member] IFRS 17 [member] | Insurance Contracts And Private Pension [Member] | Insurance Contracts And Private Pension [Member] IFRS 17 [member] | Reserve of remeasurements of defined benefit plans [member] | Reserve of remeasurements of defined benefit plans [member] IFRS 17 [member] | Reserve of exchange differences on translation [member] | Reserve of exchange differences on translation [member] IFRS 17 [member] | Reserve of cash flow hedges [member] | Reserve of cash flow hedges [member] IFRS 17 [member] | Equity attributable to owners of parent [member] | Equity attributable to owners of parent [member] IFRS 17 [member] | Non-controlling interests [member] | Non-controlling interests [member] IFRS 17 [member] | Total | IFRS 17 [member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance, value at Dec. 31, 2021 | R$ 90,729 |  | R$ (528) |  | R$ 2,250 |  | R$ 65,985 |  |  |  | R$ (2,542) |  |  |  | R$ (1,486) |  | R$ 6,531 |  | R$ (8,393) |  | R$ 152,546 |  | R$ 11,612 |  | R$ 164,158 |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transactions with owners |  |  | 457 |  | 230 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 687 |  | (2,964) |  | (2,277) |
Result of delivery of treasury shares |  |  | 457 |  | 64 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 521 |  |  |  | 521 |
Recognition of share-based payment plans |  |  |  |  | 166 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166 |  |  |  | 166 |
(Increase) / Decrease to the owners of the parent company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,964) |  | (2,964) |
Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (293) |  | (293) |
Interest on capital |  |  |  |  |  |  |  |  | (9,844) |  |  |  |  |  |  |  |  |  |  |  | (9,844) |  |  |  | (9,844) |
Unclaimed dividends and Interest on capital |  |  |  |  |  |  |  |  | 119 |  |  |  |  |  |  |  |  |  |  |  | 119 |  |  |  | 119 |
Corporate reorganization |  |  |  |  |  |  | 36 |  |  |  |  |  |  |  |  |  |  |  |  |  | 36 |  |  |  | 36 |
Other |  |  |  |  |  |  | 774 |  |  |  |  |  |  |  |  |  |  |  |  |  | 774 |  |  |  | 774 |
Total comprehensive income |  |  |  |  |  |  |  |  | 29,139 |  | (3,442) |  | 796 |  | (34) |  | (3,026) |  | (34) |  | 23,399 |  | 1,035 |  | 24,434 |
Net income |  |  |  |  |  |  |  |  | 29,207 |  |  |  |  |  |  |  |  |  |  |  | 29,207 |  | 1,035 |  | 30,242 |
Other comprehensive income for the period |  |  |  |  |  |  |  |  | (68) |  | (3,442) |  | 796 |  | (34) |  | (3,026) |  | (34) |  | (5,808) |  |  |  | (5,808) |
Appropriations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal reserve |  |  |  |  |  |  | 1,485 |  | (1,485) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory reserve |  |  |  |  |  |  | 17,929 |  | (17,929) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in the period |  |  |  | R$ 457 |  | R$ 230 |  | R$ 20,224 |  |  |  | R$ (3,442) |  | R$ 796 |  | R$ (34) |  | R$ (3,026) |  | R$ (34) |  | R$ 15,171 |  | R$ (2,222) |  | R$ 12,949
Ending balance, value at Dec. 31, 2022 | 90,729 | R$ 90,729 | (71) | R$ (71) | 2,480 | R$ 2,480 | 86,209 | R$ 86,209 |  |  | (5,984) | R$ (5,984) | 796 | R$ 796 | (1,520) | R$ (1,520) | 3,505 | R$ 3,505 | (8,427) | R$ (8,427) | 167,717 | R$ 167,717 | 9,390 | R$ 9,390 | 177,107 | R$ 177,107
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transactions with owners |  |  | 60 |  | 140 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200 |  | (924) |  | (724) |
Acquisition of treasury shares |  |  | (689) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (689) |  |  |  | (689) |
Result of delivery of treasury shares |  |  | 749 |  | (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 747 |  |  |  | 747 |
Recognition of share-based payment plans |  |  |  |  | 142 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 142 |  |  |  | 142 |
(Increase) / Decrease to the owners of the parent company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (924) |  | (924) |
Dividends |  |  |  |  |  |  | 11,000 |  | (11,000) |  |  |  |  |  |  |  |  |  |  |  |  |  | (365) |  | (365) |
Interest on capital |  |  |  |  |  |  |  |  | (12,315) |  |  |  |  |  |  |  |  |  |  |  | (12,315) |  |  |  | (12,315) |
Unclaimed dividends and Interest on capital |  |  |  |  |  |  |  |  | 53 |  |  |  |  |  |  |  |  |  |  |  | 53 |  |  |  | 53 |
Corporate reorganization |  |  |  |  |  |  | 265 |  |  |  |  |  |  |  |  |  |  |  |  |  | 265 |  |  |  | 265 |
Other |  |  |  |  |  |  | (2,852) |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,852) |  |  |  | (2,852) |
Total comprehensive income |  |  |  |  |  |  |  |  | 33,105 |  | 4,681 |  | (710) |  | (324) |  | (327) |  | 684 |  | 37,109 |  | 772 |  | 37,881 |
Net income |  |  |  |  |  |  |  |  | 33,105 |  |  |  |  |  |  |  |  |  |  |  | 33,105 |  | 772 |  | 33,877 |
Other comprehensive income for the period |  |  |  |  |  |  |  |  |  |  | 4,681 |  | (710) |  | (324) |  | (327) |  | 684 |  | 4,004 |  |  |  | 4,004 |
Appropriations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal reserve |  |  |  |  |  |  | 1,669 |  | (1,669) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory reserve |  |  |  |  |  |  | 8,174 |  | (8,174) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in the period |  |  | 60 |  | 140 |  | 18,256 |  |  |  | 4,681 |  | (710) |  | (324) |  | (327) |  | 684 |  | 22,460 |  | (517) |  | 21,943 |
Ending balance, value at Dec. 31, 2023 | 90,729 |  | (11) |  | 2,620 |  | 104,465 |  |  |  | (1,303) |  | 86 |  | (1,844) |  | 3,178 |  | (7,743) |  | 190,177 |  | 8,873 |  | 199,050 |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transactions with owners |  |  | (898) |  | 112 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (786) |  | 867 |  | 81 |
Acquisition of treasury shares |  |  | (1,775) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,775) |  |  |  | (1,775) |
Result of delivery of treasury shares |  |  | 877 |  | (17) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 860 |  |  |  | 860 |
Recognition of share-based payment plans |  |  |  |  | 129 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 129 |  |  |  | 129 |
(Increase) / Decrease to the owners of the parent company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 867 |  | 867 |
Dividends |  |  |  |  |  |  | 12,229 |  | (12,229) |  |  |  |  |  |  |  |  |  |  |  |  |  | (589) |  | (589) |
Interest on capital |  |  |  |  |  |  | 3,260 |  | (15,875) |  |  |  |  |  |  |  |  |  |  |  | (12,615) |  |  |  | (12,615) |
Dividends / Interest on capital - declared after previous period |  |  |  |  |  |  | (11,000) |  |  |  |  |  |  |  |  |  |  |  |  |  | (11,000) |  |  |  | (11,000) |
Unclaimed dividends and Interest on capital |  |  |  |  |  |  |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  | 32 |  |  |  | 32 |
Corporate reorganization |  |  |  |  |  |  | (359) |  |  |  |  |  |  |  |  |  |  |  |  |  | (359) |  |  |  | (359) |
Other |  |  |  |  |  |  | (180) |  |  |  |  |  |  |  |  |  |  |  |  |  | (180) |  |  |  | (180) |
Total comprehensive income |  |  |  |  |  |  |  |  | 41,085 |  | (2,015) |  | 470 |  | (115) |  | 8,552 |  | (2,156) |  | 45,821 |  | 1,043 |  | 46,864 |
Net income |  |  |  |  |  |  |  |  | 41,085 |  |  |  |  |  |  |  |  |  |  |  | 41,085 |  | 1,043 |  | 42,128 |
Other comprehensive income for the period |  |  |  |  |  |  |  |  |  |  | (2,015) |  | 470 |  | (115) |  | 8,552 |  | (2,156) |  | 4,736 |  |  |  | 4,736 |
Appropriations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal reserve |  |  |  |  |  |  | 1,406 |  | (1,406) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory reserve |  |  |  |  |  |  | 11,607 |  | (11,607) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in the period |  |  | (898) |  | 112 |  | 16,963 |  |  |  | (2,015) |  | 470 |  | (115) |  | 8,552 |  | (2,156) |  | 20,913 |  | 1,321 |  | 22,234 |
Ending balance, value at Dec. 31, 2024 | R$ 90,729 |  | R$ (909) |  | R$ 2,732 |  | R$ 121,428 |  |  |  | R$ (3,318) |  | R$ 556 |  | R$ (1,959) |  | R$ 11,730 |  | R$ (9,899) |  | R$ 211,090 |  | R$ 10,194 |  | R$ 221,284 |

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Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
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