Financial instruments (Details) - Schedule of rollforward of financial instruments - BRL (R$) R$ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Schedule Of Rollforward Of Financial Instruments Abstract | ||
| Borrowings and financing, beginning | R$ 8,001 | R$ 7,763 |
| Funding | 3,560 | 4,353 |
| Interest provision | 1,034 | 356 |
| Swap contracts | 45 | 70 |
| Mark-to-market | (92) | (2) |
| Exchange rate and monetary variation | (9) | (2) |
| Debt modification impact | (63) | |
| Borrowing costs | 19 | 45 |
| Interest amortization | (426) | (297) |
| Principal amortization | (58) | (4,072) |
| Swap amortization | (61) | 1 |
| Borrowings and financing, ending | R$ 12,013 | R$ 8,152 |