Deferred revenues (Details) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| IfrsStatementLineItems [Line Items] | ||
| Deferred revenues | R$ 765,711 | R$ 839,867 |
| Current portion | (259,527) | (280,422) |
| Non-current portion | 506,184 | 559,445 |
| Prepaid Services [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Deferred revenues | 130,783 | 172,824 |
| Anticipated Revenue [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Deferred revenues | 31,058 | 35,510 |
| Deferred Revenue On Sale Of Towers [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Deferred revenues | 518,445 | 572,540 |
| Contractual Liabilities [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Deferred revenues | R$ 85,425 | R$ 58,993 |