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Shareholders equipty -Income reserves (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of classes of share capital [line items] |  |
Operating Profit, Reserve Balance | R$ 299,515 |
Reserve Balance Increase (Decrease) | R$ 14,574 | R$ 7,582
Legal Reserve |  |
Disclosure of classes of share capital [line items] |  |
Reserve as Percentage of Share Capital | 20.00% |
Equity, Reserve Balance | R$ 1,847,109 | 1,847,109
Legal Reserve | Top of range [member] |  |
Disclosure of classes of share capital [line items] |  |
Percentage of Remaining Balance of Net Income | 5.00% |
Reserve as Percentage of Share Capital | 20.00% |
Percentage of Limited Legal Reserve Plus Capital Reserve of Share Capital | 30.00% |
Capital increase reserve |  |
Disclosure of classes of share capital [line items] |  |
Reserve as Percentage of Share Capital | 80.00% |
Equity, Reserve Balance | R$ 2,807,632 | 15,670,952
Capital increase reserve | Top of range [member] |  |
Disclosure of classes of share capital [line items] |  |
Percentage of Remaining Balance of Net Income | 90.00% |
Reserve as Percentage of Share Capital | 80.00% |
Special statutory reserve |  |
Disclosure of classes of share capital [line items] |  |
Reserve as Percentage of Share Capital | 20.00% |
Equity, Reserve Balance | R$ 1,847,109 | 1,887,576
Special statutory reserve | Top of range [member] |  |
Disclosure of classes of share capital [line items] |  |
Percentage of Remaining Balance of Net Income | 10.00% |
Reserve as Percentage of Share Capital | 20.00% |
Tax incentives |  |
Disclosure of classes of share capital [line items] |  |
Equity, Reserve Balance | R$ 1,319,908 | 998,237
Investment reserve |  |
Disclosure of classes of share capital [line items] |  |
Equity, Reserve Balance | 5,157,140 | R$ 14,972,324
Loss absorption (Note 24.3) | R$ (7,315,184) |

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