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Equity and Remuneration to Shareholders - Schedule of Minimum Dividends Proposed (Details) - BRL (R$) R$ / shares in Units, R$ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Calculation of minimum dividends required by the by-laws for the preferred shares |  |  |
Nominal value of the preferred shares | R$ 9,526 | R$ 7,328 | R$ 7,328
Preferred shares | R$ 9,526 | R$ 7,328 | R$ 7,328
Percentage applied to the nominal value of the preferred shares | 10.00% | 10.00% | 10.00%
Amount of the dividends by the first payment criterion | R$ 953 | R$ 733 | R$ 733
Equity | R$ 27,378 | R$ 24,649 | R$ 21,777
Preferred shares as a percentage of Equity (net of shares held in Treasury) | 66.56% | 66.56% | 66.56%
Portion of Equity represented by the preferred shares | R$ 18,223 | R$ 16,406 | R$ 14,495
Percentage applied to the portion of Equity represented by the preferred shares | 3.00% | 3.00% | 3.00%
Amount of the dividends by the second payment criterion | R$ 547 | R$ 492 | R$ 435
Minimum dividends required by the by-laws for the preferred shares | 953 | 733 | 733
Calculation of the Minimum Dividend under the by-laws based on the net income for the year |  |  |
Net income for the year | R$ 7,117 | R$ 5,764 | R$ 4,092
Mandatory dividend percentage | 50.00% | 50.00% | 50.00%
Mandatory dividends - 50% of Net income | R$ 3,559 | R$ 2,882 | R$ 2,046
Unrealized profit reserve | (835) | (835) | (835)
Reversal of the unrealized profit reserve | 835 | 835 | 835
Withholding income tax on Interest on equity | 175 | 242 | 186
Minimum Dividend under the by-laws including income tax on interest on equity | 3,734 | 3,124 | 2,232
Dividends recorded, as specified in the by-laws |  |  |
Interest on Equity | 1,849 | 2,592 | 1,983
Ordinary dividends | 1,885 | 532 | 249
Total dividends for the preferred shares | 2,485 | 2,079 | 1,486
Total dividends for the common shares | R$ 1,249 | R$ 1,045 | R$ 746
Unit value of dividends - R$ |  |  |
Minimum dividends required by the by-laws for the preferred shares | R$ 0.5 | R$ 0.5 | R$ 0.5
Mandatory dividends (including withholding income tax on Interest on Equity) | 1.31 | 1.42 | 1.01
Dividends proposed: Common (ON) shares | 1.31 | 1.42 | 1.01
Dividends proposed: Preferred (PN) shares | R$ 1.31 | R$ 1.42 | R$ 1.01

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