Insurance contracts and private pension (Tables)
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12 Months Ended |
Dec. 31, 2025 |
| Insurance Contracts And Private Pension [Abstract] |
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| Schedule of Insurance Contracts and Private Pension Portfolios and Measurement Approach |
Insurance contracts and private pension portfolios and measurement approach are presented below: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Note | 12/31/2025 | | 12/31/2024 | | (Assets) / liabilities | Income | | (Assets) / liabilities | Income | | Contractual | Financial | | Contractual | Financial | | General model (BBA) | | 14,307 | | 3,301 | | (826) | | | 16,399 | | 2,332 | | (1,385) | | | lnsurance | 27a I | 5,897 | | 3,126 | | (309) | | | 5,752 | | 2,463 | | (268) | | | Private pension | 27a II | 8,410 | | 175 | | (517) | | | 10,647 | | (131) | | (1,117) | | | Variable fee approach (VFA) | 27a II | 338,116 | | 1,543 | | (41,332) | | | 289,823 | | 1,869 | | (22,310) | | | Private pension | | 338,116 | | 1,543 | | (41,332) | | | 289,823 | | 1,869 | | (22,310) | | | Simplified model (PAA) | 27a I | 618 | | 2,725 | | 8 | | | 611 | | 2,335 | | 16 | | | lnsurance | | 642 | | 2,765 | | 4 | | | 631 | | 2,382 | | 11 | | | Reinsurance | | (24) | | (40) | | 4 | | | (20) | | (47) | | 5 | | | Total Insurance contracts and private pension | | 353,041 | | 7,569 | | (42,150) | | | 306,833 | | 6,536 | | (23,679) | | | lnsurance | | 6,539 | | 5,891 | | (305) | | | 6,383 | | 4,845 | | (257) | | | Reinsurance | | (24) | | (40) | | 4 | | | (20) | | (47) | | 5 | | | Private pension | | 346,526 | | 1,718 | | (41,849) | | | 300,470 | | 1,738 | | (23,427) | | | Current | | 16,861 | | - | | - | | | 17,913 | | - | | - | | | Non-current | | 336,180 | | - | | - | | | 288,920 | | - | | - | |
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| Schedule of Reconciliation of Insurance |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12/31/2025 | | 12/31/2024 | | Liability for remaining coverage | Loss component of the liability for remaining coverage | Liability for incurred claims | Total | | Liability for remaining coverage | Loss component of the liability for remaining coverage | Liability for incurred claims | Total | | Opening balance - 01/01 | 3,868 | | 1,850 | | 645 | | 6,363 | | | 3,015 | | 1,960 | | 609 | | 5,584 | | | Income from insurance contracts and private pension | (8,061) | | 469 | | 1,741 | | (5,851) | | | (6,446) | | (39) | | 1,687 | | (4,798) | | | Financial income from insurance contracts and private pension | 104 | | (12) | | 11 | | 103 | | | 233 | | (71) | | - | | 162 | | | Premiums received, claims and other expenses paid | 7,616 | | - | | (1,716) | | 5,900 | | | 7,066 | | - | | (1,651) | | 5,415 | | | Closing balance | 3,527 | | 2,307 | | 681 | | 6,515 | | | 3,868 | | 1,850 | | 645 | | 6,363 | |
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| Schedule of Reconciliation of Insurance One |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12/31/2025 | | 12/31/2024 | | Estimate of present value of future cash flows | Contractual service margin | Risk adjustment for non-financial risk | Total | | Estimate of present value of future cash flows | Contractual service margin | Risk adjustment for non-financial risk | Total | | Opening balance - 01/01 | 146 | | 5,928 | | 289 | | 6,363 | | | 86 | | 5,215 | | 283 | | 5,584 | | | Realization of insurance contractual margin | - | | (6,369) | | - | | (6,369) | | | - | | (5,194) | | - | | (5,194) | | | Actuarial remeasurements | 993 | | (508) | | 33 | | 518 | | | 1,557 | | (1,151) | | (10) | | 396 | | | Income from insurance contracts and private pension | 993 | | (6,877) | | 33 | | (5,851) | | | 1,557 | | (6,345) | | (10) | | (4,798) | | | New recognized insurance contracts | (6,885) | | 6,872 | | 13 | | - | | | (6,760) | | 6,743 | | 17 | | - | | | Financial income from insurance contracts and private pension | (260) | | 374 | | (11) | | 103 | | | (152) | | 315 | | (1) | | 162 | | | Recognized in income for the period | (88) | | 374 | | 15 | | 301 | | | (76) | | 315 | | 13 | | 252 | | | Recognized in other comprehensive income | (172) | | - | | (26) | | (198) | | | (76) | | - | | (14) | | (90) | | | Premiums received, claims and other expenses paid | 5,900 | | - | | - | | 5,900 | | | 5,415 | | - | | - | | 5,415 | | | Closing balance | (106) | | 6,297 | | 324 | | 6,515 | | | 146 | | 5,928 | | 289 | | 6,363 | |
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| Schedule of Reconciliation of Private Pension |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12/31/2025 | | 12/31/2024 | | Liability for remaining coverage | Loss component of the liability for remaining coverage | Liability for incurred claims | Total | | Liability for remaining coverage | Loss component of the liability for remaining coverage | Liability for incurred claims | Total | | Opening balance - 01/01 | 299,662 | | 716 | | 92 | | 300,470 | | | 265,128 | | 595 | | 98 | | 265,821 | | | Income from insurance contracts and private pension | (77,896) | | (222) | | 76,400 | | (1,718) | | | (89,794) | | 137 | | 87,919 | | (1,738) | | | Financial income from insurance contracts and private pension | 40,997 | | (345) | | 5 | | 40,657 | | | 22,753 | | (16) | | (1) | | 22,736 | | | Premiums received, claims and other expenses paid | 83,515 | | - | | (76,398) | | 7,117 | | | 101,575 | | - | | (87,924) | | 13,651 | | | Closing Balance | 346,278 | | 149 | | 99 | | 346,526 | | | 299,662 | | 716 | | 92 | | 300,470 | |
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| Schedule of Reconciliation of Private Pension One |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12/31/2025 | | 12/31/2024 | | Estimate of present value of future cash flows | Contractual service margin | Risk adjustment for non-financial Risk | Total | | Estimate of present value of future cash flows | Contractual service margin | Risk adjustment for non-financial Risk | Total | | Opening balance - 01/01 | 279,220 | | 20,944 | | 306 | | 300,470 | | | 245,564 | | 19,936 | | 321 | | 265,821 | | | Realization of insurance contractual margin | - | | (1,572) | | - | | (1,572) | | | - | | (1,899) | | - | | (1,899) | | | Actuarial remeasurements | (1,706) | | 1,594 | | (34) | | (146) | | | 379 | | (196) | | (22) | | 161 | | | Income from insurance contracts and private pension | (1,706) | | 22 | | (34) | | (1,718) | | | 379 | | (2,095) | | (22) | | (1,738) | | | New recognized insurance contracts | (3,597) | | 3,589 | | 8 | | - | | | (3,103) | | 3,097 | | 6 | | - | | | Financial Income from insurance contracts and private pension | 40,656 | | 6 | | (5) | | 40,657 | | | 22,729 | | 6 | | 1 | | 22,736 | | | Recognized in income for the period | 41,832 | | 6 | | 11 | | 41,849 | | | 23,410 | | 6 | | 11 | | 23,427 | | | Recognized in other comprehensive income | (1,176) | | - | | (16) | | (1,192) | | | (681) | | - | | (10) | | (691) | | | Premiums received, claims and other expenses paid | 7,117 | | - | | - | | 7,117 | | | 13,651 | | - | | - | | 13,651 | | | Closing balance | 321,690 | | 24,561 | | 275 | | 346,526 | | | 279,220 | | 20,944 | | 306 | | 300,470 | |
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| Schedule of Contractual Service Margin |
ITAÚ UNIBANCO HOLDING expects to recognize the Contractual service margin in income according to the terms and amounts shown below: | | | | | | | | | | | | | | | | | | | | | | | | | Period | 12/31/2025 | | 12/31/2024 | | lnsurance | Private Pension | Total | | lnsurance | Private Pension | Total | | 1 year | 3,132 | | 2,072 | | 5,204 | | | 2,388 | | 2,068 | | 4,456 | | | 2 years | 1,880 | | 2,248 | | 4,128 | | | 1,638 | | 2,084 | | 3,722 | | | 3 years | 956 | | 2,410 | | 3,366 | | | 1,188 | | 2,115 | | 3,303 | | | 4 years | 263 | | 2,242 | | 2,505 | | | 580 | | 2,077 | | 2,657 | | | 5 years | 58 | | 2,083 | | 2,141 | | | 115 | | 1,935 | | 2,050 | | | Over 5 years | 8 | | 13,506 | | 13,514 | | | 19 | | 10,665 | | 10,684 | | | Total | 6,297 | | 24,561 | | 30,858 | | | 5,928 | | 20,944 | | 26,872 | |
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| Schedule of Discount Rates |
The rates used by indexing unit to discount cash flows from insurance contracts and private pension are as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12/31/2025 | | 12/31/2024 | | Indexes | 1 year | 3 years | 5 years | 10 years | 20 years | | 1 year | 3 years | 5 years | 10 years | 20 years | | IGPM | 7.29 | % | 8.04 | % | 7.98 | % | 7.58 | % | 7.34 | % | | 7.43 | % | 5.69 | % | 6.29 | % | 6.18 | % | 5.88 | % | | IPCA | 9.13 | % | 7.80 | % | 7.62 | % | 7.23 | % | 7.04 | % | | 7.63 | % | 8.05 | % | 7.79 | % | 7.59 | % | 7.36 | % | | TR | 11.69 | % | 11.33 | % | 11.55 | % | 11.65 | % | 11.63 | % | | 13.07 | % | 13.48 | % | 13.24 | % | 12.78 | % | 12.58 | % |
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| Schedule of Claims Development |
| | | | | | | | | | | | | | | | | | | | | | Occurrence date | 12/31/2021 | 12/31/2022 | 12/31/2023 | 12/31/2024 | 12/31/2025 | Total | | At the end of event period | 1,265 | | 1,167 | | 1,125 | | 1,205 | | 1,240 | | | | After 1 year | 1,530 | | 1,416 | | 1,383 | | 1,467 | | | | | After 2 years | 1,571 | | 1,444 | | 1,421 | | | | | | After 3 years | 1,584 | | 1,460 | | | | | | | After 4 years | 1,596 | | | | | | | | Accumulated payments through base date | 1,562 | | 1,445 | | 1,409 | | 1,457 | | 1,155 | | 7,028 | | | Liabilities recognized in the balance sheet | | | | | | 732 | | | Liabilities in relation to prior periods | | | | | | 19 | | | Other estimates | | | | | | 32 | | | Adjustment to present value | | | | | | (46) | | | Risk adjustment to non-financial risk | | | | | | 43 | | | Liability for claims incurred at 12/31/2025 | | | | | | 780 | |
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