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32 Operating Costs and Expenses (Details 6) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net R$ 333,275    
Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   R$ 212,495 R$ 272,631
Financial offset for the use of water resources [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 63,841    
Financial offset for the use of water resources [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   103,737 105,310
Collection charge [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 49,903    
Collection charge [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   51,156 44,682
Net losses in the decommissioning and disposal of assets [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 44,020    
Net losses in the decommissioning and disposal of assets [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   38,151 70,640
Compensation [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 38,423    
Compensation [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   63,628 31,045
Taxes [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 37,847    
Taxes [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   28,651 78,323
Donations, contributions, grants, tax incentives [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net [1] 22,136    
Donations, contributions, grants, tax incentives [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net [1]   12,829 12,314
Leasing and rent [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 9,705    
Leasing and rent [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   8,536 34,226
Associacao das emissoras de radiodifusao do parana - AERP [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 11,455    
Associacao das emissoras de radiodifusao do parana - AERP [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   10,862 10,753
Publicity [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 9,598    
Publicity [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   7,206 6,127
Talento olimpico paranaens - TOP [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 4,750    
Talento olimpico paranaens - TOP [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   4,719 4,537
Sponsorship [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net 1,126    
Sponsorship [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net   2,460 2,685
Other net income, costs and expenses [member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net [2] R$ 40,471    
Other net income, costs and expenses [member] | Restated [Member]      
Disclosure of operating costs and expenses [line items]      
Other operating costs and expenses, net [2]   R$ (119,440) R$ (128,011)
[1] The balance includes the Company's social investments in education, culture, health, sports, among others, including incentive donations used as a tax benefit.
[2] The 2019 balance includes R$ 97,664 of water rate reversal (TCFRH).