Hedge accounting - Narrative (Details) - BRL (R$) R$ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of detailed information about hedged items [line items] | ||
| Risk factor designated coverage ratio | 100.00% | |
| Foreign currency conversion reserve | R$ (20) | R$ (226) |
| Remaining Accumulated | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Effect of fair value hedge adjustments | R$ (79) | R$ 8 |