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Financial Instruments and Risk Management - Schedule of Exposure to Exchange Rates Risk (Details) - BRL (R$) R$ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Assets |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | R$ 2,807 | R$ 1,920 |
Concession Grant Fee - IPCA (Note 12.3) | 3,098 | 3,031 |
Assets | 59,726 | 55,000 |
Liabilities |  |  |
Loans and debentures - IPCA and IGP-DI (Note 20) | (7,547) | (4,522) |
Deficit of pension plan (Forluz) | (494) | (521) |
Leasing liabilities | (429) | (433) | R$ (354)
Liabilities | (32,344) | R$ (30,344) |
IPCA [member] | Amount Book Value [Member] |  |  |
Assets |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | 2,715 |  |
Concession financial assets related to gas distribution infrastructure - IGPM | 92 |  |
Concession Grant Fee - IPCA (Note 12.3) | 3,098 |  |
Assets | 5,905 |  |
Liabilities |  |  |
Loans and debentures - IPCA and IGP-DI (Note 20) | (7,547) |  |
Deficit of pension plan (Forluz) | (494) |  |
Leasing liabilities | (429) |  |
Liabilities | (8,470) |  |
Net liabilities exposed | (2,565) |  |
IPCA [member] | Probable Scenario [Member] |  |  |
Assets |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | 2,837 |  |
Concession financial assets related to gas distribution infrastructure - IGPM | 96 |  |
Concession Grant Fee - IPCA (Note 12.3) | 3,238 |  |
Assets | 6,171 |  |
Liabilities |  |  |
Loans and debentures - IPCA and IGP-DI (Note 20) | (7,887) |  |
Deficit of pension plan (Forluz) | (516) |  |
Leasing liabilities | (449) |  |
Liabilities | (8,852) |  |
Net liabilities exposed | (2,681) |  |
Net effect of fluctuation in IPCA and IGP-M indexes | (116) |  |
IPCA [member] | Adverse Scenario [Member] |  |  |
Assets |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | 2,934 |  |
Concession financial assets related to gas distribution infrastructure - IGPM | 101 |  |
Concession Grant Fee - IPCA (Note 12.3) | 3,349 |  |
Assets | 6,384 |  |
Liabilities |  |  |
Loans and debentures - IPCA and IGP-DI (Note 20) | (8,157) |  |
Deficit of pension plan (Forluz) | (534) |  |
Leasing liabilities | (464) |  |
Liabilities | (9,155) |  |
Net liabilities exposed | (2,771) |  |
Net effect of fluctuation in IPCA and IGP-M indexes | R$ (206) |  |

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