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Shareholders equity - Other reserves (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | R$ 44,810,300 | R$ 33,166,365 | R$ 15,175,130
Exchange rate variations on conversion of financial information of the subsidiaries abroad | 163,185 | 4,707 | (16,035)
Equity at end of period | 32,415,575 | 44,810,300 | 33,166,365
Debenture conversion 5th issue |  |  |
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | (45,746) | (45,746) |
Equity at end of period | (45,746) | (45,746) | (45,746)
Actuarial loss |  |  |
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | (229,627) | (144,799) |
Increase (Decrease) Through Actuarial Gains Losses | 90,931 | (84,828) |
Equity at end of period | (138,696) | (229,627) | (144,799)
Reserve of gains and losses on remeasuring available-for-sale financial assets [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | 1,298 | 2,163 |
Gains (losses) on conversion of financial statements and on foreign investments | (364,231) | (865) |
Equity at end of period | (362,933) | 1,298 | 2,163
Reserve of exchange differences on translation [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | 8,396 | 3,218 |
Exchange rate variations on conversion of financial information of the subsidiaries abroad | 163,185 | 5,178 |
Equity at end of period | 171,580 | 8,396 | 3,218
Deemed Cost |  |  |
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | 1,803,975 | 1,904,680 |
Partial Realization of Deemed Cost, Net of Taxes | (79,385) | (100,705) |
Equity at end of period | 1,724,590 | 1,803,975 | 1,904,680
Other reserves |  |  |
Disclosure of classes of share capital [line items] |  |  |
Equity at beginning of period | 1,538,296 | 1,719,516 | 2,114,907
Increase (Decrease) Through Actuarial Gains Losses | 90,931 | (84,828) |
Gains (losses) on conversion of financial statements and on foreign investments | (364,231) | (865) |
Exchange rate variations on conversion of financial information of the subsidiaries abroad | 163,185 | 5,178 |
Partial Realization of Deemed Cost, Net of Taxes | (79,385) | (100,705) |
Equity at end of period | R$ 1,348,796 | R$ 1,538,296 | R$ 1,719,516

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