Cash and cash equivalents (Details) - BRL (R$) R$ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2022 |
Dec. 31, 2021 |
|
| Disclosure Of Cash And Cash Equivalents Text Block Abstract | ||
| Funds held | R$ 25 | R$ 25 |
| Weighted average interest rate | 86.66% | 109.64% |
| Investment date | 90 days |