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Condensed statements of income (Details) - BRL (R$)
R$ / shares in Units, R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financial income (expenses)      
Operating income   R$ 4,253,266  
Discontinued operations      
Net income R$ 5,048,602 3,909,750 R$ 2,062,869
Companhia Paranaense De Energia Copel [Member]      
Operating revenues (expenses)      
General and administrative expenses (126,172) (79,762) (59,907)
Other revenues (expenses), net (86,344) (24,423) 1,244
Result of equity in investees 3,689,345 3,551,254 2,177,629
Operating income before financial results 3,476,829 3,447,069 2,118,966
Financial income (expenses)      
Financial revenues 304,809 335,485 209,679
Financial expenses (112,332) (86,076) (235,033)
Operating income 3,669,306 3,696,478 2,093,612
Income tax and social contribution      
Income tax and social contribution 67,641 (21,195)
Deferred income tax and social contribution 30,250 127,503 5,850
Net income from continuing operations 3,767,197 3,823,981 2,078,267
Discontinued operations      
Net income (loss) from discontinued operations 1,185,376 80,221 (88,321)
Net income R$ 4,952,573 R$ 3,904,202 R$ 1,989,946
Basic and diluted net earning per share attributed to controlling shareholders - expressed in Brazilian Reais      
Common shares R$ 1.20448 R$ 1.33430 R$ 0.72523
Class A preferred shares 1.41173 1.76982 0.89086
Class B preferred shares 1.50668 1.46773 0.79778
Common shares 1.61429 1.36229 0.69440
Class A preferred shares 1.86252 1.80062 0.85790
Class B preferred shares R$ 1.95747 R$ 1.49852 R$ 0.76388