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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (Details 6) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | R$ (4,249) | R$ (5,954)
Base scenario [member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (4,249) |
Net liabilities exposed | (4,249) |
Probable Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (4,152) |
Net liabilities exposed | (4,152) |
Net effect of exchange rate fluctuation | 97 |
Adverse Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (4,886) |
Net liabilities exposed | (4,886) |
Net effect of exchange rate fluctuation | (637) |
Loans and financings [member] | Base scenario [member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (3,975) |
Loans and financings [member] | Probable Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (3,885) |
Loans and financings [member] | Adverse Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (4,571) |
Suppliers (itaipu binacional) [member] | Base scenario [member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (274) |
Suppliers (itaipu binacional) [member] | Probable Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | (267) |
Suppliers (itaipu binacional) [member] | Adverse Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net liabilities exposed | R$ (315) |

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