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INTANGIBLE ASSETS (Details) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | R$ 14,621 | R$ 12,953 | R$ 11,810 | R$ 11,624
Temporary Easements Intangible Assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 9 | 10 | 9 | 8
Service concession rights [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 4 | 5 | 6 | 7
Assets Of Concession [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 13,555 | 11,807 | 11,674 | 11,517
Assets Of Concession G S F [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 832 | 966 |  |
Other intangible assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 15 | 4 | 8 | 10
Useful Life Defined Intangible Asset [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 14,415 | 12,792 | R$ 11,697 | R$ 11,542
Intangible Assets Under Developments [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 206 | 161 |  |
Gross carrying amount [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 25,172 | 22,775 |  |
Gross carrying amount [member] | Temporary Easement Intangible Assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 15 | 15 |  |
Gross carrying amount [member] | Service concession rights [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 14 | 13 |  |
Gross carrying amount [member] | Assets Of Concession [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 23,813 | 21,476 |  |
Gross carrying amount [member] | Assets Of Concession G S F [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 1,032 | 1,032 |  |
Gross carrying amount [member] | Other intangible assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 92 | 78 |  |
Gross carrying amount [member] | Useful Life Defined Intangible Asset [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 24,966 | 22,614 |  |
Gross carrying amount [member] | Intangible Assets Under Developments [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | 206 | 161 |  |
Accumulated depreciation and amortisation [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (10,551) | (9,822) |  |
Accumulated depreciation and amortisation [member] | Temporary Easement Intangible Assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (6) | (5) |  |
Accumulated depreciation and amortisation [member] | Service concession rights [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (10) | (8) |  |
Accumulated depreciation and amortisation [member] | Assets Of Concession [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (10,258) | (9,669) |  |
Accumulated depreciation and amortisation [member] | Assets Of Concession G S F [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (200) | (66) |  |
Accumulated depreciation and amortisation [member] | Other intangible assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | (77) | (74) |  |
Accumulated depreciation and amortisation [member] | Useful Life Defined Intangible Asset [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets | R$ (10,551) | R$ (9,822) |  |

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