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19. Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2018
Intangible Assets Tables Abstract  
Inangible assets
     
  12.31.2018 12.31.2017
Concession agreement - distribution of electricity (19.1)  5,390,063  5,750,873
Generation concession agreements/ authorization (19.2)  593,852  619,221
Concession agreement - piped gas distribution (19.3)  3,619  43,888
Others (19.4)  41,563  38,842
   6,029,097  6,452,824
Changes in Intangible Assets

 

        Special liabilities   
  in service in progress in service in progress Total 
Balance as of January 1, 2017       7,537,158           849,715       (2,845,024)                          (28,468)       5,513,381
Acquisitions                      -           757,709                       -                                      -          757,709
Customers contributions                 628                      -                 (579)                        (125,983)        (125,934)
Provision for claims added to the cost of the works                      -             (1,587)                       -                                      -            (1,587)
Transfers to accounts receivable related to concession (Note 10.1)                      -           (56,853)                       -                                      -          (56,853)
Capitalizations for intangible in service          822,472         (822,472)          (128,351)                          128,351                      -
Amortization of quotas - concession (a)        (411,575)                      -           125,740                                      -        (285,835)
Amortization of quotas - PIS/Pasep and Cofins credits          (11,014)                      -                       -                                      -          (11,014)
Loss on disposal          (29,704)           (12,066)               2,776                                      -          (38,994)
Balance as of December 31, 2017       7,907,965           714,446       (2,845,438)                          (26,100)       5,750,873
Transfers to contract assets (Note 11.1)                       -         (714,446)                       -                            26,100        (688,346)
Transfers from contract assets (Note 11.1)           775,701                      -          (107,679)                                      -          668,022
Amortization of quotas - concession (a)        (431,963)                      -           130,388                                      -        (301,575)
Amortization of quotas - PIS/Pasep and Cofins credits          (10,813)                      -                       -                                      -          (10,813)
Loss on disposal          (28,098)                      -                       -                                      -          (28,098)
Balance as of December 31, 2018       8,212,792                      -       (2,822,729)                                      -       5,390,063
(a) Amortization during the concession as of the start of commercial operations of the enterprises or based on the useful life of the assets, of the two the shortest.
Generation concession agreements

.        
  Concession contract (a) Concession and  
  in service  in progress authorization rights Total
Balance as of January 1, 2017   254,280   6,299 403,133   663,712
ANEEL grant - use of public property - 678 -   678
Amortization of quotas - concession and authorization (b) (17,837) - (13,139)   (30,976)
Transfer to property, plant and equipment - - (14,193)   (14,193)
Balance as of December 31, 2017   236,443   6,977 375,801   619,221
ANEEL grant - use of public property - 302 -   302
Business combination (Note 1.2) - -   4,845 4,845
Amortization of quotas - concession and authorization (b) (17,311) - (13,205)   (30,516)
Capitalizations for intangible in service   7,279 (7,279) -   -
Balance as of December 31, 2018   226,411 - 367,441   593,852
(a) Includes the balances of use of public asset and hydrological risk renegotiation
(b) Amortization during the concession/authorization as of the start of commercial operations of the enterprises.
         
Piped gas distribution service concession

 

  in service  in progress Total 
Balance as of January 1, 2017        198,271              40,238        238,509
Acquisitions                    -              13,745          13,745
Transfers to accounts receivable related to concession      (154,908)            (24,501)      (179,409)
Capitalizations for intangible in service          10,011            (10,011)                   -
Amortization of quotas - concession (a)        (28,753)                        -        (28,753)
Loss on disposal             (204)                        -             (204)
Balance as of December 31, 2017          24,417              19,471          43,888
Transfers to contract assets (Note 11.2)                     -            (19,471)        (19,471)
Transfers from contract assets (Note 11.2)            2,042                        -            2,042
Amortization of quotas - concession (a)        (22,759)                        -        (22,759)
Loss on disposal               (81)                        -               (81)
Balance as of December 31, 2018            3,619                        -            3,619
(a)  Amortization during the concession as of the start of commercial operations of the enterprises or based on the useful life of the assets, of the two the shortest.
Other Intangible Assets
.      
  in service  in progress Total
Balance as of January 1, 2017  25,725  18,485  44,210
Acquisitions  -  6,932  6,932
Transfers from property, plant and equipment  105  -  105
Capitalizations for intangible in service  5,744  (5,744)  -
Amortization of quotas (b)  (8,809)  -  (8,809)
Amortization of quotas - PIS/Pasep and Cofins credits  (54)  -  (54)
Loss on disposal  (18)  (3,524)  (3,542)
Balance as of December 31, 2017  22,693  16,149  38,842
Effect of acquisition of control of Costa Oeste and Marumbi  -  37  37
Acquisitions  -  7,589  7,589
Transfers from property, plant and equipment  112  1,979  2,091
Capitalizations for intangible in service  9,448  (9,448)  -
Amortization of quotas (a)  (6,410)  -  (6,410)
Amortization of quotas - PIS/Pasep and Cofins credits  (23)  -  (23)
Loss on disposal  (190)  (373)  (563)
Balance as of December 31, 2018  25,630  15,933  41,563
(a) Annual amortization rate: 20%.