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Financial Instruments and Risk Management - Schedule of Exposure to Exchange Rates Risk (Details) - BRL (R$) R$ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Assets |  |  |  |
Concession financial assets related to Distribution infrastructure - IPCA |  | R$ 1,920 | R$ 1,407 |
Concession Grant Fee - IPCA (Note 14) |  | 3,031 | 2,950 |
Assets |  | 55,000 | 53,671 |
Liabilities |  |  |  |
Loans and debentures - IPCA and IGP-DI (Note 22) |  | (4,522) | (4,630) |
Deficit of pension plan (Forluz) (Note 24) |  | (521) | (545) |
Leasing liabilities |  | (433) | (354) | R$ (244)
Liabilities |  | (30,344) | R$ (31,887) |
IPCA [member] | Amount Book Value [Member] |  |  |  |
Assets |  |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | [1] | 1,882 |  |
Concession financial assets related to gas distribution infrastructure - IGPM |  | 39 |  |
Concession Grant Fee - IPCA (Note 14) |  | 3,031 |  |
Assets |  | 4,952 |  |
Liabilities |  |  |  |
Loans and debentures - IPCA and IGP-DI (Note 22) |  | (4,522) |  |
Debt agreed with pension fund (Forluz) - IPCA (Note 24) |  | (90) |  |
Deficit of pension plan (Forluz) (Note 24) |  | (521) |  |
Leasing liabilities |  | (433) |  |
Liabilities |  | (5,566) |  |
Net liabilities exposed |  | (614) |  |
IPCA [member] | Probable Ccenario [Member] |  |  |  |
Assets |  |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | [1] | 1,961 |  |
Concession financial assets related to gas distribution infrastructure - IGPM |  | 40 |  |
Concession Grant Fee - IPCA (Note 14) |  | 3,159 |  |
Assets |  | 5,160 |  |
Liabilities |  |  |  |
Loans and debentures - IPCA and IGP-DI (Note 22) |  | (4,713) |  |
Debt agreed with pension fund (Forluz) - IPCA (Note 24) |  | (94) |  |
Deficit of pension plan (Forluz) (Note 24) |  | (543) |  |
Leasing liabilities |  | (451) |  |
Liabilities |  | (5,801) |  |
Net liabilities exposed |  | (641) |  |
Net effect of fluctuation in IPCA and IGP-M indexes |  | (27) |  |
IPCA [member] | Adverse Scenario [Member] |  |  |  |
Assets |  |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | [1] | 2,010 |  |
Concession financial assets related to gas distribution infrastructure - IGPM |  | 41 |  |
Concession Grant Fee - IPCA (Note 14) |  | 3,238 |  |
Assets |  | 5,289 |  |
Liabilities |  |  |  |
Loans and debentures - IPCA and IGP-DI (Note 22) |  | (4,831) |  |
Debt agreed with pension fund (Forluz) - IPCA (Note 24) |  | (96) |  |
Deficit of pension plan (Forluz) (Note 24) |  | (557) |  |
Leasing liabilities |  | (463) |  |
Liabilities |  | (5,947) |  |
Net liabilities exposed |  | (658) |  |
Net effect of fluctuation in IPCA and IGP-M indexes |  | R$ (44) |  |
[1] | Portion of the Concession financial assets relating to the Regulatory Remuneration Base of Assets ratified by the grantor (ANEEL) after the 4th tariff review cycle.

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