Material accounting policies - Narrative (Details) - BRL (R$) R$ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 01, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of disaggregation of revenue from contracts with customers [line items] | |||
| Estimated expected credit loss write-off period | 24 months | ||
| Change in accounting estimate generated impact | R$ 2,756 | ||
| Change in accounting estimate generated impact net of taxes | R$ 1,453 | ||
| Equity Net of Tax Percentage | |||
| Disclosure of disaggregation of revenue from contracts with customers [line items] | |||
| Stockholders’ equity, net of tax. percentage | 0.60% | ||