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Intangible Assets - Schedule of Composition of Intangible Assets (Details) - BRL (R$) R$ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | R$ 15,249 | R$ 14,621 | R$ 12,953 | R$ 11,810
Temporary Easements Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 8 | 9 | 10 | 9
Onerous Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 4 | 4 | 5 | 6
Assets of Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 14,284 | 13,555 | 11,807 | 11,674
Assets of Concession GSF [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 697 | 832 | 966 |
Other Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 60 | 15 | 4 | 8
Useful Life Defined Intangible Asset [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 15,053 | 14,415 | R$ 12,792 | R$ 11,697
Intangible Assets Under Developments [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 196 | 206 |  |
Historical Cost [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 26,612 | 25,172 |  |
Historical Cost [Member] | Temporary Easements Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 15 | 15 |  |
Historical Cost [Member] | Onerous Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 14 | 14 |  |
Historical Cost [Member] | Assets of Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 25,217 | 23,813 |  |
Historical Cost [Member] | Assets of Concession GSF [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 1,031 | 1,032 |  |
Historical Cost [Member] | Other Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 139 | 92 |  |
Historical Cost [Member] | Useful Life Defined Intangible Asset [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 26,416 | 24,966 |  |
Historical Cost [Member] | Intangible Assets Under Developments [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 196 | 206 |  |
Accumulated depreciation and amortisation [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (11,363) | (10,551) |  |
Accumulated depreciation and amortisation [member] | Temporary Easements Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (7) | (6) |  |
Accumulated depreciation and amortisation [member] | Onerous Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (10) | (10) |  |
Accumulated depreciation and amortisation [member] | Assets of Concession [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (10,933) | (10,258) |  |
Accumulated depreciation and amortisation [member] | Assets of Concession GSF [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (334) | (200) |  |
Accumulated depreciation and amortisation [member] | Other Intangible Assets [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (79) | (77) |  |
Accumulated depreciation and amortisation [member] | Useful Life Defined Intangible Asset [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | R$ (11,363) | R$ (10,551) |  |

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