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Equity and Remuneration to Shareholders - Schedule of Share Capital (Details) - shares | Dec. 31, 2024 | Apr. 29, 2024 | Dec. 31, 2023
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IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 2,861,781,895 | 660,411,207 | 2,201,370,688
Percentage of changes in share capital | 100.00% |  | 100.00%
State of minas gerais [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 487,562,874 |  | 375,048,387
Percentage of changes in share capital | 17.04% |  | 17.00%
PZENA [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 458,460,259 |  | 73,283,989
Percentage of changes in share capital | 16.02% |  | 3.00%
F I A Dinamica Energia S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 106,610,119 |  | 349,956,346
Percentage of changes in share capital | 3.73% |  | 16.00%
B N D E S Participacoes [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 95,239,166 |  | 82,007,784
Percentage of changes in share capital | 3.33% |  | 4.00%
Black Rock [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 282,815,226 |  | 217,550,174
Percentage of changes in share capital | 9.88% |  | 10.00%
Other Shareholders In Brazil [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 146,287,788 |  | 130,878,309
Percentage of changes in share capital | 5.11% |  | 6.00%
Other Shareholders In Foreign [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 1,284,806,463 |  | 972,645,699
Percentage of changes in share capital | 44.89% |  | 44.00%
Common Shares [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 956,601,911 |  | 735,847,624
Percentage of changes in share capital | 100.00% |  | 99.00%
Common Shares [Member] | State of minas gerais [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 487,540,664 |  | 375,031,032
Percentage of changes in share capital | 50.97% |  | 51.00%
Common Shares [Member] | PZENA [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 310,667,579 |  |
Percentage of changes in share capital | 32.48% |  |
Common Shares [Member] | F I A Dinamica Energia S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 106,610,119 |  | 233,004,992
Percentage of changes in share capital | 11.14% |  | 31.00%
Common Shares [Member] | B N D E S Participacoes [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  |  | 82,007,784
Percentage of changes in share capital |  |  | 11.00%
Common Shares [Member] | Black Rock [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  |  |
Percentage of changes in share capital |  |  |
Common Shares [Member] | Other Shareholders In Brazil [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 39,409,416 |  | 29,160,676
Percentage of changes in share capital | 4.12% |  | 4.00%
Common Shares [Member] | Other Shareholders In Foreign [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 12,374,133 |  | 16,642,870
Percentage of changes in share capital | 1.29% |  | 2.00%
Preference shares [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 1,905,179,984 | 439,656,920 | 1,465,523,064
Percentage of changes in share capital | 100.00% |  | 101.00%
Preference shares [member] | State of minas gerais [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 22,210 |  | 17,085
Percentage of changes in share capital |  |  |
Preference shares [member] | PZENA [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 147,792,680 |  | 73,283,989
Percentage of changes in share capital | 7.76% |  | 5.00%
Preference shares [member] | F I A Dinamica Energia S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  |  | 116,951,354
Percentage of changes in share capital |  |  | 8.00%
Preference shares [member] | B N D E S Participacoes [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 95,239,166 |  |
Percentage of changes in share capital | 5.00% |  |
Preference shares [member] | Black Rock [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 282,815,226 |  | 217,550,174
Percentage of changes in share capital | 14.84% |  | 15.00%
Preference shares [member] | Other Shareholders In Brazil [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 106,878,372 |  | 101,717,633
Percentage of changes in share capital | 5.61% |  | 7.00%
Preference shares [member] | Other Shareholders In Foreign [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 1,272,432,330 |  | 956,002,829
Percentage of changes in share capital | 66.79% |  | 66.00%

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