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Contract assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes and other explanatory information [abstract] |
Schedule of summary of contract assets |
| 12.31.2024 | 12.31.2023
Power distribution service concession (10.1) | 1,701,448 |  | 2,201,958 |
Power transmission concession (10.2) | 5,509,458 |  | 5,403,103 |
| 7,210,906 |  | 7,605,061 |
Current | 283,896 |  | 284,616 |
Noncurrent | 6,927,010 |  | 7,320,445 |
Schedule of power distribution service concession contract |
| Assets | Special liabilities | Total
Balance as of January 1, 2023 | 2,405,124 |  | (72,953) |  | 2,332,171 |
Acquisitions | 2,305,311 |  | — |  | 2,305,311 |
Customers contributions | — |  | (339,277) |  | (339,277) |
Transfers to intangible assets (Note 16.1) | (1,888,949) |  | 273,071 |  | (1,615,878) |
Transfers to accounts receivable - concessions (Note 9.1) | (507,401) |  | 56,151 |  | (451,250) |
Other transfers | (12,391) |  | — |  | (12,391) |
Write-offs or disposal | (16,728) |  | — |  | (16,728) |
Balance as of December 31, 2023 | 2,284,966 |  | (83,008) |  | 2,201,958 |
Acquisitions | 2,465,040 |  | — |  | 2,465,040 |
Customers contributions | — |  | (268,692) |  | (268,692) |
Transfers to intangible assets (Note 16.1) | (2,303,950) |  | 200,428 |  | (2,103,522) |
Transfers to accounts receivable – concessions (Note 9.1) | (630,818) |  | 51,998 |  | (578,820) |
Other transfers | (20) |  | — |  | (20) |
Write-offs or disposal | (14,496) |  | — |  | (14,496) |
Balance as of December 31, 2024 | 1,800,722 |  | (99,274) |  | 1,701,448 |
Schedule of transmission service concession contract |
| Concession assets | RBSE assets | Total
Balance as of January 1, 2023 | 3,894,276 |  | 1,416,200 |  | 5,310,476 |
Realization of fair value adjustments recognized in the business combination | 722 |  | — |  | 722 |
Transfers to electricity grid use charges - customers | (423,851) |  | (294,975) |  | (718,826) |
Transfers to property, plant and equipment | (4,086) |  | — |  | (4,086) |
Transfers from litigations | (458) |  | — |  | (458) |
Remuneration | 521,308 |  | 194,722 |  | 716,030 |
Construction revenue (Note 28.1) | 85,181 |  | — |  | 85,181 |
Construction income (Note 28.1) | 1,410 |  | — |  | 1,410 |
Gain from efficiency (Note 28.1) | 12,654 |  | — |  | 12,654 |
Balance as of December 31, 2023 | 4,087,156 |  | 1,315,947 |  | 5,403,103 |
Realization of fair value adjustments recognized in the business combination | 722 |  | — |  | 722 |
Transfers to electricity grid use charges – customers | (508,832) |  | (306,596) |  | (815,428) |
Transfers to property, plant and equipment | (5,185) |  | — |  | (5,185) |
Transfers from litigations | (2,994) |  | — |  | (2,994) |
Remuneration | 617,622 |  | 188,105 |  | 805,727 |
Construction revenue (Note 28.1) | 95,610 |  | — |  | 95,610 |
Construction income (Note 28.1) | 2,040 |  | — |  | 2,040 |
Gain from efficiency (Note 28.1) | 25,863 |  | — |  | 25,863 |
Balance as of December 31, 2024 | 4,312,002 |  | 1,197,456 |  | 5,509,458 |
Schedule of assumptions adopted for the calculation of contract assets | (a) Average rate of contracts (b) Contract 075/2001 – LT 230 kV Bateias – Jaguariaíva, from Copel GET, and contract 002/2005 – LT 525 kV Ivaiporã – Londrina, from Uirapuru, are adjusted by the IGPM. (c) Increase in the RAP financial portion of RBSE assets, due to the re-profiling defined by Aneel Homologatory Resolution No. 2,847/2021.

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