Goodwill and Intangible assets - Narrative (Details) - BRL (R$) R$ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of reconciliation of changes in intangible assets and goodwill [line items] | |||
| Goodwill and intangible assets | R$ 24,099 | R$ 23,997 | R$ 23,364 |
| Banco ITAU Chile | |||
| Disclosure of reconciliation of changes in intangible assets and goodwill [line items] | |||
| Goodwill and intangible assets | 3,010 | 3,073 | |
| Acquisition of Payrolls and Associations Rights | |||
| Disclosure of reconciliation of changes in intangible assets and goodwill [line items] | |||
| Amortization expense | R$ (1,297) | R$ (1,313) | |