Shareholders equity - Treasury shares (Details) - BRL (R$) |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Disclosure of classes of share capital [line items] | |||
| Balance, Beginning of the period | 28,208,827 | 24,875,787 | 24,875,787 |
| Exercised | (356,734) | (372,160) | |
| Repurchase | 3,128,800 | 3,705,200 | |
| Treasury Stock, Number of Shares | 30,980,893 | 28,208,827 | |
| Weighted Average Price Per Share, Treasury Shares | R$ 53.57 | R$ 53.84 | R$ 53.84 |
| Exercised | 53.57 | 53.66 | |
| Repurchase | 42.68 | 51.80 | |
| Weighted Average Price Per Share, Treasury Shares | R$ 52.47 | R$ 53.57 | |
| Treasury shares | R$ 1,511,146,000 | R$ 1,339,197,000 | R$ 1,339,197,000 |
| Exercised | (19,110,000) | (19,969,000) | |
| Repurchase | 133,541,000 | 191,918,000 | 191,918,000 |
| Treasury shares | 1,625,577,000 | 1,511,146,000 | |
| Market Value Of Treasury Shares | 1,451,344,000 | R$ 1,536,826,000 | 1,536,826,000 |
| Exercised | (18,383,000) | (20,251,000) | |
| Repurchase | 133,541,000 | 191,918,000 | |
| Market Value Of Treasury Shares | R$ 1,231,490,000 | R$ 1,451,344,000 | |