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Shareholders equity - Dividends and reserve calculations (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of classes of share capital [abstract] |  |  |
Minimum Annual Dividend As A Percent Of Adjusted Net Income | 25.00% |  |
Minimum Annual Dividend As A Percentage Of Consolidated Operating Cash Generation | 10.00% |  |
Accounting EBITDA |  | R$ 19,537,398 |
Non-Recurring and Non-Cash Items |  | (1,264,428) |
Adjusted Earnings Before Interest, Taxes, Depreciation, and Amortization |  | 18,272,970 |
Reserves for Capital Expenditures |  | (6,706,367) |
Gross Cash from Operations |  | 11,566,603 |
Minimum mandatory dividends of the Bylaws |  | 1,156,660 |
Interim Dividends Declared |  | 1,500,000 |
Withholding income tax |  | (190,119) |
Interest on own capital distributed in excess |  | R$ (153,221) |
Additional proposed dividend |  |  | R$ (93,633)

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