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Trade Accounts Receivable (Details 1) - BRL (R$) R$ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | R$ 4,078,882 | R$ 3,866,429
Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 360,928 | 337,499
Residential Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 106,440 | 123,889
Industrial Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 77,038 | 87,323
Commercial Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 181,104 | 141,068
Rural Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 10,058 | 10,493
Public Entities Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 5,011 | 13,142
Public Lighting Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 454 | 6,108
Public Service Accounts Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | 2,074 | 1,685
Adjustment to present value Account Receivable [Member] | Debt installments [Member] |  |
Disclosure of Trade Accounts Receivable [Line Items] |  |
Trade receivables | R$ (21,251) | R$ (46,209)

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