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Equity and Remuneration to Shareholders - Schedule of Share Capital (Details) - shares | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 2,201,370,688 | 2,201,370,688 | 1,693,362,068
Percentage of changes in share capital | 100.00% | 100.00% | 100.00%
State of minas gerais [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 375,048,387 | 375,048,387 | 288,498,775
Percentage of changes in share capital | 17.00% | 17.00% | 17.00%
Other Entities Of Minas Gerais State [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  | 21,910,971 | 14,495,439
Percentage of changes in share capital |  | 1.00% | 1.00%
PZENA [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 73,283,989 |  |
Percentage of changes in share capital | 3.00% |  |
F I A Dinamica Energia S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 349,956,346 | 352,396,700 | 233,359,090
Percentage of changes in share capital | 16.00% | 16.00% | 14.00%
B N D E S Participacoes [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 82,007,784 | 82,007,784 | 85,224,631
Percentage of changes in share capital | 4.00% | 4.00% | 5.00%
Black Rock [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 217,550,174 | 218,212,381 | 123,325,741
Percentage of changes in share capital | 10.00% | 10.00% | 7.00%
Other Shareholders In Brazil [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 130,878,309 | 204,766,598 | 189,570,960
Percentage of changes in share capital | 6.00% | 9.00% | 11.00%
Other Shareholders In Foreign [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 972,645,699 | 947,027,867 | 758,887,432
Percentage of changes in share capital | 44.00% | 43.00% | 45.00%
Common Shares [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 735,847,624 | 735,847,624 | 566,036,634
Percentage of changes in share capital | 99.00% | 100.00% | 100.00%
Common Shares [Member] | State of minas gerais [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 375,031,302 | 375,031,302 | 288,485,632
Percentage of changes in share capital | 51.00% | 51.00% | 51.00%
Common Shares [Member] | Other Entities Of Minas Gerais State [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  | 30,021 | 23,094
Common Shares [Member] | F I A Dinamica Energia S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 233,004,992 | 233,625,046 | 153,354,328
Percentage of changes in share capital | 31.00% | 31.00% | 27.00%
Common Shares [Member] | B N D E S Participacoes [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 82,007,784 | 82,007,784 | 63,082,911
Percentage of changes in share capital | 11.00% | 11.00% | 11.00%
Common Shares [Member] | Other Shareholders In Brazil [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 29,160,676 | 26,546,632 | 43,689,699
Percentage of changes in share capital | 4.00% | 4.00% | 8.00%
Common Shares [Member] | Other Shareholders In Foreign [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 16,642,870 | 18,606,839 | 17,400,970
Percentage of changes in share capital | 2.00% | 3.00% | 3.00%
Preference shares [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 1,465,523,064 | 1,465,523,064 | 1,127,325,434
Percentage of changes in share capital | 101.00% | 100.00% | 100.00%
Preference shares [member] | State of minas gerais [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 17,085 | 17,085 | 13,143
Preference shares [member] | Other Entities Of Minas Gerais State [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  | 21,880,950 | 14,472,345
Percentage of changes in share capital |  | 1.00% | 1.00%
Preference shares [member] | PZENA [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 73,283,989 |  |
Percentage of changes in share capital | 5.00% |  |
Preference shares [member] | F I A Dinamica Energia S A [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 116,951,354 | 118,771,654 | 80,004,762
Percentage of changes in share capital | 8.00% | 8.00% | 7.00%
Preference shares [member] | B N D E S Participacoes [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued |  |  | 22,141,720
Percentage of changes in share capital |  |  | 2.00%
Preference shares [member] | Black Rock [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 217,550,174 | 218,212,381 | 123,325,741
Percentage of changes in share capital | 15.00% | 15.00% | 11.00%
Preference shares [member] | Other Shareholders In Brazil [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 101,717,633 | 178,219,966 | 145,881,261
Percentage of changes in share capital | 7.00% | 12.00% | 13.00%
Preference shares [member] | Other Shareholders In Foreign [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Number of shares issued | 956,002,829 | 928,421,028 | 741,486,462
Percentage of changes in share capital | 66.00% | 64.00% | 66.00%

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