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Consolidated Statements of Financial Position - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
CURRENT ASSETS      
Cash and cash equivalents R$ 3,222,768 R$ 2,941,727  
Bonds and securities 1,465 3,112  
Collaterals and escrow accounts 197    
Trade accounts receivable 3,768,242 3,120,168  
Dividends receivable 67,066    
CRC transferred to the Parana State Government 287,789    
Sectorial financial assets 173,465 355,570  
Accounts receivable - concessions 4,515    
Contract assets 285,682    
Other current receivables 514,185 426,865  
Inventories 162,791    
Income tax and social contribution receivable 86,410    
Other current recoverable taxes 1,565,323 205,060  
Prepaid expenses 36,987 33,563  
Before assets held for sale 10,176,885    
Assets held for sale 1,230,546    
TOTAL CURRENT ASSETS 11,407,431    
Long Term Assets      
Bonds and securities 299,065 278,969  
Other temporary investments 22,385    
Collaterals and escrow accounts 133,521    
Trade accounts receivable 51,438 62,399  
CRC transferred to the Parana State Government 1,104,835    
Judicial deposits 486,746 504,190  
Sectorial financial assets 173,465 118,419  
Accounts receivable - concessions 1,897,825    
Contract assets 5,207,115    
Other noncurrent receivables 845,460 661,759  
Income tax and social contribution receivable 137,778    
Deferred income tax and social contribution 1,191,104 1,011,866 R$ 1,007,061
Other noncurrent recoverable taxes 4,539,498    
Prepaid expenses 44 132  
Total long term asset 16,090,279    
Investments 2,729,517    
Property, plant and equipment 9,495,460 10,592,103  
Intangible assets 6,929,456 6,332,611  
Right-of-use asset 132,521    
Total non current asset 35,377,233    
TOTAL ASSETS 46,784,664    
CURRENT LIABILITIES      
Payroll, social charges and accruals 684,046 337,044  
Accounts payable to suppliers 2,291,307 1,685,280  
Income tax and social contribution payable 681,831    
Other taxes due 490,608 501,068  
Loans and financing 717,677 255,521  
Debentures 1,881,411    
Dividend payable 991,887    
Post-employment benefits 69,231    
Sectorial charges payable 33,712 28,508  
Research and development and Energy efficiency 380,186 375,395  
Accounts payable related to concession 88,951 73,032  
Sectorial financial liabilities 188,709    
Lease liability 41,193    
Other accounts payable 235,400 149,407  
PIS and Cofins to be refunded to consumers 121,838    
Before liabilities associated with assets held for sale 8,897,987    
Liabilities associated with assets held for sale 756,405    
TOTAL CURRENT LIABILITIES 9,654,392    
NONCURRENT LIABILITIES      
Accounts payable to suppliers 145,145 187,913  
Deferred income tax and social contribution 484,338 293,666 157,420
Other taxes due 622,483 662,114  
Loans and financing 2,470,854 2,886,862  
Debentures 4,876,070    
Post-employment benefits 1,424,383 1,128,932  
Research and development and Energy efficiency 284,825 282,776  
Accounts payable related to concession 642,913    
Sectorial financial liabilities 102,284  
Lease liability 97,168    
Other accounts payable 469,886 349,462  
PIS and Cofins to be refunded to consumers 3,805,985    
Provisions for legal claims 1,555,704    
TOTAL NONCURRENT LIABILITIES 16,879,754    
Attributable to controlling shareholders      
Capital 10,800,000 10,800,000  
Equity valuation adjustments 353,349 591,927 785,610
Legal reserve 1,209,458    
Profit retention reserve 6,088,855    
Additional dividends proposed from the non-capitalized earning reserve 1,507,449    
TOTAL EQUITY 19,959,111    
EQUITY - Attributable to non-controlling interests      
EQUITY - Attributable to controlling shareholders 291,407 345,798 303,289
TOTAL EQUITY AFTER NON-CONTROLLING INTERESTS 20,250,518 17,598,212 16,336,214
TOTAL LIABILITIES & EQUITY R$ 46,784,664    
Restated [Member]      
CURRENT ASSETS      
Cash and cash equivalents   2,941,727 1,948,409
Bonds and securities   3,112 124,862
Collaterals and escrow accounts   147 203
Trade accounts receivable   3,120,168 2,944,091
Dividends receivable   70,092 76,672
CRC transferred to the Parana State Government   219,236 190,876
Sectorial financial assets   355,570 421,184
Accounts receivable - concessions   4,545 4,180
Contract assets   161,740 134,016
Other current receivables   426,865 363,250
Inventories   130,442 116,285
Income tax and social contribution receivable   236,929 152,157
Other current recoverable taxes   205,060 160,842
Prepaid expenses   33,563 40,819
Before assets held for sale   7,909,196 6,677,846
Assets held for sale  
TOTAL CURRENT ASSETS   7,909,196 6,677,846
Long Term Assets      
Bonds and securities   278,969 219,434
Other temporary investments   27,734 19,511
Collaterals and escrow accounts   98,433 89,555
Trade accounts receivable   62,399 162,915
CRC transferred to the Parana State Government   1,131,449 1,254,166
Judicial deposits   504,190 528,290
Sectorial financial assets   118,419 257,635
Accounts receivable - concessions   1,873,824 1,792,685
Contract assets   4,628,913 4,053,040
Other noncurrent receivables   661,759 228,894
Income tax and social contribution receivable   142,532 166,384
Deferred income tax and social contribution   1,011,866 1,007,061
Other noncurrent recoverable taxes   322,011 231,400
Prepaid expenses   132 3,290
Total long term asset   10,862,630 10,014,260
Investments   2,523,179 2,368,234
Property, plant and equipment   10,592,103 10,840,663
Intangible assets   6,332,611 6,029,097
Right-of-use asset   92,831 118,022
Total non current asset   30,403,354 29,370,276
TOTAL ASSETS   38,312,550 36,048,122
CURRENT LIABILITIES      
Payroll, social charges and accruals   337,044 284,179
Accounts payable to suppliers   1,685,280 1,419,243
Income tax and social contribution payable   60,132 197,949
Other taxes due   501,068 451,433
Loans and financing   255,521 1,113,047
Debentures   1,164,301 2,184,881
Dividend payable   616,356 375,675
Post-employment benefits   66,004 58,478
Sectorial charges payable   28,508 79,872
Research and development and Energy efficiency   375,395 270,429
Accounts payable related to concession   73,032 67,858
Sectorial financial liabilities  
Lease liability   33,573 27,956
Other accounts payable   149,407 192,070
PIS and Cofins to be refunded to consumers  
Before liabilities associated with assets held for sale   5,345,621 6,723,070
Liabilities associated with assets held for sale  
TOTAL CURRENT LIABILITIES   5,345,621 6,723,070
NONCURRENT LIABILITIES      
Accounts payable to suppliers   187,913 49,956
Deferred income tax and social contribution   293,666 157,420
Other taxes due   662,114 796,732
Loans and financing   2,886,862 2,934,260
Debentures   7,265,409 5,333,250
Post-employment benefits   1,128,932 910,285
Research and development and Energy efficiency   282,776 322,306
Accounts payable related to concession   539,555 516,305
Sectorial financial liabilities   102,284 96,531
Lease liability   63,031 90,066
Other accounts payable   349,462 116,954
PIS and Cofins to be refunded to consumers  
Provisions for legal claims   1,606,713 1,664,773
TOTAL NONCURRENT LIABILITIES   15,368,717 12,988,838
Attributable to controlling shareholders      
Capital   10,800,000 7,910,000
Equity valuation adjustments   591,927 785,610
Legal reserve   1,014,248 914,751
Profit retention reserve   4,846,239 6,422,564
Additional dividends proposed from the non-capitalized earning reserve  
TOTAL EQUITY   17,252,414 16,032,925
EQUITY - Attributable to non-controlling interests      
EQUITY - Attributable to controlling shareholders   345,798 303,289
TOTAL EQUITY AFTER NON-CONTROLLING INTERESTS   17,598,212 16,336,214
TOTAL LIABILITIES & EQUITY   R$ 38,312,550 R$ 36,048,122