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Intangible Assets - Schedule of Changes in Intangible Assets (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | R$ 14,621 | R$ 12,953 | R$ 11,810
Additions |  | 187 | 119 | 1,083
Disposals |  | (94) | (57) | (23)
Amotization |  | (1,055) | (956) | (829)
Transfers | [1] | 1,590 | 2,562 | 912
Ending balance |  | 15,249 | 14,621 | 12,953
Intangible Assets under Development [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 206 | 161 | 113
Additions |  | 158 | 106 | 51
Disposals |  | (3) |  |
Transfers | [1] | (165) | (61) | (3)
Ending balance |  | 196 | 206 | 161
Temporary Easements Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 9 | 10 | 9
Amotization |  | (1) | (1) | (1)
Transfers | [1] |  |  | 2
Ending balance |  | 8 | 9 | 10
Onerous Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 4 | 5 | 6
Amotization |  |  | (1) | (1)
Ending balance |  | 4 | 4 | 5
Assets of Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 13,555 | 11,807 | 11,674
Additions |  | 3 |  |
Disposals |  | (81) | (57) | (23)
Amotization |  | (914) | (817) | (757)
Transfers | [1] | 1,721 | 2,622 | 913
Ending balance |  | 14,284 | 13,555 | 11,807
Assets of Concession GSF [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 832 | 966 |
Additions |  |  |  | 1,032
Amotization |  | (135) | (134) | (66)
Ending balance |  | 697 | 832 | 966
Other Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 15 | 4 | 8
Additions |  | 26 | 13 |
Disposals |  | (10) |  |
Amotization |  | (5) | (3) | (4)
Transfers | [1] | 34 | 1 |
Ending balance |  | 60 | 15 | 4
Useful Life Defined Intangible Asset [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Beginning balance |  | 14,415 | 12,792 | 11,697
Additions |  | 29 | 13 | 1,032
Disposals |  | (91) | (57) | (23)
Amotization |  | (1,055) | (956) | (829)
Transfers | [1] | 1,755 | 2,623 | 915
Ending balance |  | R$ 15,053 | R$ 14,415 | R$ 12,792
[1] | The main transfers were made between concession contract assets to Intangible assets: in 2022 of R$2,448 (R$902 in 2021).

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