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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [abstract]  
Schedule of property plant and equipment
CostAccumulated depreciation12.31.2024CostAccumulated depreciation12.31.2023
In service
Reservoirs, dams and aqueducts6,869,100 (4,885,663)1,983,437 8,201,193 (5,068,855)3,132,338 
Machinery and equipment8,745,054 (3,206,049)5,539,005 9,790,697 (3,087,977)6,702,720 
Buildings1,398,552 (933,130)465,422 2,009,061 (1,176,398)832,663 
Land388,270 (58,358)329,912 499,020 (69,256)429,764 
Vehicles12,811 (10,673)2,138 13,056 (11,120)1,936 
Furniture and fixtures12,449 (6,880)5,569 14,296 (8,570)5,726 
(-) Impairment (15.4)— — — (674,077)— (674,077)
(-) Special Obligations(19,223)681 (18,542)(6,877)510 (6,367)
17,407,013 (9,100,072)8,306,941 19,846,369 (9,421,666)10,424,703 
In progress
Cost224,635 — 224,635 415,597 — 415,597 
(-) Impairment (15.4)(14,879)— (14,879)(14,879)— (14,879)
209,756 — 209,756 400,718 — 400,718 
17,616,769 (9,100,072)8,516,697 20,247,087 (9,421,666)10,825,421 
Schedule of changes in property plant and equipment
Balance as of January 1, 2024Additions / ImpairmentDepreciationWrite-offs or disposalTransfersReclassification (a)Balance as of December 31, 2024
In service
Reservoirs, dams and aqueducts3,132,338 — (137,424)(2,852)13,078 (1,021,703)1,983,437 
Machinery and equipment6,702,720 29,258 (388,447)(6,992)196,068 (993,602)5,539,005 
Buildings832,663 — (35,563)(13,341)32,125 (350,462)465,422 
Land429,764 — (12,027)(7,272)16,337 (96,890)329,912 
Vehicles1,936 — (489)(8)701 (2)2,138 
Furniture and fixtures5,726 — (549)(287)948 (269)5,569 
(-) Impairment (15.4)(674,077)(27,755)— — — 701,832 — 
(-) Special Obligations(6,367)— 470 — (12,703)58 (18,542)
10,424,703 1,503 (574,029)(30,752)246,554 (1,761,038)8,306,941 
In progress
Cost415,597 142,584 — (1,482)(244,677)(87,387)224,635 
(-) Impairment (15.4)(14,879)— — — — — (14,879)
400,718 142,584 — (1,482)(244,677)(87,387)209,756 
10,825,421 144,087 (574,029)(32,234)1,877 (1,848,425)8,516,697 
(a) Reclassification to Assets classified as held for sale (Note 37).
Balance as of January 1, 2023Additions /
Impairment		DepreciationWrite-offs or disposalTransfersBusiness combination effectsReclassification (a)Balance as of December 31, 2023
In service
Reservoirs, dams and aqueducts3,274,774 — (142,902)(14)480 — — 3,132,338 
Machinery and equipment5,890,366 — (389,646)(2,475)283,777 1,139,428 (218,730)6,702,720 
Buildings841,252 — (36,707)(517)37,804 — (9,169)832,663 
Land451,524 — (10,173)(647)4,109 — (15,049)429,764 
Vehicles2,342 — (458)(1)53 — — 1,936 
Furniture and fixtures6,136 — (603)(393)689 5 (108)5,726 
(-) Impairment (15.4)(785,205)174,500 — — (171,504)— 108,132 (674,077)
(-) Special Obligations(418)— 246 — (6,297)— 102 (6,367)
9,680,771 174,500 (580,243)(4,047)149,111 1,139,433 (134,822)10,424,703 
In progress
Cost575,080 162,540 — (6,411)(321,101)47,675 (42,186)415,597 
(-) Impairment (15.4)(186,383)— — — 171,504 — — (14,879)
388,697 162,540 — (6,411)(149,597)47,675 (42,186)400,718 
10,069,468 337,040 (580,243)(10,458)(486)1,187,108 (177,008)10,825,421 
(a) Reclassification to Assets classified as held for sale (Note 37)
Schedule of joint operations property plant and equipment
Joint operations Share Copel GeT (%)Annual average depreciation rate (%)12.31.202412.31.2023
HPP Gov. Jayme Canet Júnior (Mauá)51.0 %
In service860,522 859,888 
(-) Accumulated depreciation2.74 %(336,843)(313,253)
In progress18,112 20,447 
541,791 567,082 
HPP Baixo Iguaçu30.0 %
In service701,346 697,225 
(-) Accumulated depreciation3.30 %(132,481)(110,039)
In progress 34,433 42,989 
603,298 630,175 
1,145,089 1,197,257 
Schedule of impairment of property plant and equipment
Balance as of January 1, 2023Impairment / ReversalTransferBalance as of December 31, 2023Impairment / ReversalReclassificationBalance as of December 31, 2024
In service
HPP Colíder(632,559)133,653 — (498,906)— 498,906 — 
UEGA(108,132)108,132 — — — — — 
Power plants in Paraná (44,514)40,847 (171,504)(175,171)(27,755)202,926 — 
(785,205)282,632 (171,504)(674,077)(27,755)701,832 — 
In progress
Consórcio Tapajós (a)(14,879)— — (14,879)— — (14,879)
Power plants in Paraná (171,504)— 171,504 — — — — 
(186,383)— 171,504 (14,879)— — (14,879)
(971,588)282,632 — (688,956)(27,755)701,832 (14,879)
(a) Project under development
Schedule of impairment risk
Cash-generating unitsDiscount rateRV/BV-1RV/BV-1
(5% Variation)		RV/BV-1
(10% Variation)		Impairment Risk
Wind power Assets
São Bento Complex (a)
8.17 %85.98 %81.73 %77.66 %— 
Brisa I Complex (b)
8.17 %76.93 %72.69 %68.61 %— 
Brisa II Complex (c)
8.17 %70.38 %65.45 %60.73 %— 
Bento Miguel Complex (d)
8.17 %49.46 %45.05 %40.87 %— 
Cutia Complex (e)
8.17 %39.32 %35.53 %31.92 %— 
Jandaíra Complex (f)
5.29 %43.28 %39.34 %35.58 %— 
Vilas Complex (g)
4.94 %59.50 %54.94 %50.57 %— 
Aventura Complex (h)
4.66 %47.92 %43.97 %40.17 %— 
Santa Rosa e Mundo Novo Complex (i)
4.66 %151.84 %145.11 %138.65 %— 
Hydric Assets
Foz do Areia5.43 %78.05 %72.30 %66.81 %— 
Segredo5.43 %54.22 %49.51 %45.01 %— 
Caxias5.43 %52.17 %47.62 %43.27 %— 
Baixo Iguaçu5.43 %3.52 %1.05 %-1.33 %8,189 
Mauá5.43 %126.24 %121.53 %116.98 %— 
Bela Vista7.66 %96.08 %89.39 %83.08 %— 
Elejor8.00 %27.83 %24.65 %21.59 %— 
(a) GE Boa Vista, GE Farol, GE Olho D’Água e GE São Bento do Norte wind farms.
(b) Nova Asa Branca I, Nova Asa Branca II, Nova Asa Branca III e Nova Eurus IV wind farms.
(c) Santa Maria, Santa Helena e Ventos de Santo Uriel wind farms.
(d) São Bento do Norte I, São Bento do Norte II, São Bento do Norte III, São Miguel I, São Miguel II and GE São Miguel III wind farms.
(e) Cutia, Guajiru, Jangada, Maria Helena, Potiguar, Esperança e Paraíso dos Ventos wind farms.
(f) Jandaíra I, Jandaíra II, Jandaíra III e Jandaíra IV wind farms.
(g) Potiguar B61, Potiguar B141, Potiguar B142, Potiguar B143 e Ventos de Vila Paraíba IV wind farms.
(h) Aventura II, Aventura III, Aventura IV, Aventura V wind farms.
(i) Santa Rosa e Mundo Novo - SRMN: SRMN I, SRMN II, SRMN III, SRMN IV e SRMN V wind farms.
Schedule of average depreciation rates
Depreciation rates (%) 12.31.202412.31.202312.31.2022
Average generation segment rates
General equipment6.06 6.24 6.25 
Machinery and equipment3.29 3.87 3.68 
Generations3.40 3.42 3.42 
Reservoirs, dams and ducts2.26 2.64 2.67 
Hydraulic turbines2.77 2.88 2.89 
Wind power plant unit4.85 4.94 4.94 
Buildings2.79 3.05 3.07 
Average rates for central government assets
Buildings3.34 3.33 3.33 
Machinery and office equipment12.07 6.25 6.25 
Furniture and fixtures6.26 6.27 6.25 
Vehicles14.29 14.29 14.29