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Contract assets (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of summary of contract assets
   
  12.31.2023 12.31.2022
Power distribution service concession (10.1)            2,201,958            2,332,171
Piped gas distribution service concession (10.2)                           -                 30,032
Power transmission concession (10.3)            5,403,103            5,310,476
             7,605,061            7,672,679
Current                284,616               220,660
Noncurrent             7,320,445            7,452,019
Schedule of power distribution service concession contract
     
Consolidated Assets Special liabilities  Total 
Balance as of January 1, 2022 1,851,866 (53,671) 1,798,195
Acquisitions 2,092,117 - 2,092,117
Customers contributions - (243,916) (243,916)
Transfers to intangible assets (Note 17.1) (1,332,118) 194,794 (1,137,324)
Transfers to accounts receivable - concessions (Note 9.1) (197,912) 29,840 (168,072)
Loss on disposal (8,829) - (8,829)
Balance as of December 31, 2022 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 17.1) (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)
Loss on disposal (16,728) - (16,728)
Balance as of December 31, 2023 2,284,966 (83,008) 2,201,958
Schedule of piped gas distribution service concession contract
 
Balance as of January 1, 2022                       29,815
Acquisitions                       13,955
Transfers to intangible assets (Note 17.3)                      (13,738)
Balance as of December 31, 2022                       30,032
Acquisitions                       25,510
Transfers to intangible assets (Note 17.3)                      (11,503)
Reclassification (a) (44,039)
Balance as of December 31, 2023                                 -
(a) Reclassification to Assets classified as held for sale (Note 39).  
Schedule of transmission service concession contract
     
  Concession assets RBSE assets Total
Balance as of January 1, 2022            3,632,386            1,427,652            5,060,038
Realization of gains/losses in business combinations                      721                          -                      721
Transfers to electricity grid use charges - customers             (389,939)             (213,378)             (603,317)
Transfers to property, plant and equipment                 (3,822)                          -                 (3,822)
Transfers from litigations                 (1,558)                          -                 (1,558)
Remuneration               509,722               201,926               711,648
Construction revenue                 89,166                          -                 89,166
Construction income                   1,458                          -                   1,458
Loss from inefficiency  (10.3.1)                 56,142                          -                 56,142
Balance as of December 31, 2022            3,894,276            1,416,200            5,310,476
Realization of gains/losses in business combinations                      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                 85,181                          -                 85,181
Construction income                   1,410                          -                   1,410
Gain from efficiency  (10.3.1)                 12,654                          -                 12,654
Balance as of December 31, 2023            4,087,156            1,315,947            5,403,103
Schedule of assumptions adopted for the calculation of contract assets
           
.     12.31.2023     12.31.2022
  Concession assets RBSE assets Concession assets RBSE assets
  Financial Economic Financial Economic
Construction margin 1.65% N/A N/A 1.65% N/A N/A
Operating and maintenance margin 1.65% N/A N/A 1.65% N/A N/A
Remuneration rate (a)  9.60% p.a.   8.11% p.a.   11.10% p.a.   9.58% p.a.   8.11% p.a.   11.10% p.a. 
Contract correction index  IPCA (b)   IPCA   IPCA   IPCA (b)   IPCA   IPCA 
Annual RAP, according to Ratifying Resolution (c)          574,028        201,158        157,525          523,713          91,276        151,560
 (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.