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34 Operating Segments (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |  |
ASSETS | R$ 38,312,550 | R$ 35,930,100 |  |
CURRENT ASSETS | 7,909,196 | 6,677,846 |  |
NON-CURRENT ASSETS | 30,403,354 | 29,252,254 |  |
Long term assets | 10,862,630 | 10,014,260 |  |
Investments | 2,523,179 | 2,368,234 | R$ 2,570,643 | [1]
Property, plant and equipment | 10,592,103 | 10,840,663 | R$ 9,829,450 |
Intangible assets | 6,332,611 | 6,029,097 |  |
Right-of-use asset | 92,831 |  |  |
Electric Energy GET [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | 19,457,551 | 18,573,953 |  |
CURRENT ASSETS | 2,039,443 | 1,722,519 |  |
NON-CURRENT ASSETS | 17,418,108 | 16,851,434 |  |
Long term assets | 5,054,560 | 4,660,867 |  |
Investments | 2,371,374 | 2,212,271 |  |
Property, plant and equipment | 9,735,093 | 9,728,872 |  |
Intangible assets | 233,973 | 249,424 |  |
Right-of-use asset | 23,108 |  |  |
Electric Energy DIS [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | 13,434,522 | 12,331,603 |  |
CURRENT ASSETS | 4,631,991 | 3,971,915 |  |
NON-CURRENT ASSETS | 8,802,531 | 8,359,688 |  |
Long term assets | 3,051,058 | 2,968,282 |  |
Investments | 813 | 1,343 |  |
Property, plant and equipment |  |  |  |
Intangible assets | 5,703,686 | 5,390,063 |  |
Right-of-use asset | 46,974 |  |  |
Com [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | 690,372 | 227,287 |  |
CURRENT ASSETS | 229,630 | 181,077 |  |
NON-CURRENT ASSETS | 460,742 | 46,210 |  |
Long term assets | 460,312 | 43,564 |  |
Investments | 247 | 2,442 |  |
Property, plant and equipment | 53 | 51 |  |
Intangible assets | 123 | 153 |  |
Right-of-use asset | 7 |  |  |
TEL [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | 1,527,098 | 1,264,748 |  |
CURRENT ASSETS | 528,754 | 88,239 |  |
NON-CURRENT ASSETS | 998,344 | 1,176,509 |  |
Long term assets | 137,770 | 88,798 |  |
Investments |  |  |  |
Property, plant and equipment | 833,974 | 1,071,489 |  |
Intangible assets | 19,844 | 16,222 |  |
Right-of-use asset | 6,756 |  |  |
GAS [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | 904,993 | 675,286 |  |
CURRENT ASSETS | 313,896 | 204,725 |  |
NON-CURRENT ASSETS | 591,097 | 470,561 |  |
Long term assets | 576,190 | 466,942 |  |
Investments |  |  |  |
Property, plant and equipment |  |  |  |
Intangible assets |  | 3,619 |  |
Right-of-use asset | 14,907 |  |  |
HOL [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | 3,183,677 | 3,359,407 |  |
CURRENT ASSETS | 1,127,469 | 1,214,523 |  |
NON-CURRENT ASSETS | 2,056,208 | 2,144,884 |  |
Long term assets | 1,879,619 | 1,950,280 |  |
Investments | 150,746 | 152,178 |  |
Property, plant and equipment | 22,983 | 40,251 |  |
Intangible assets | 1,781 | 2,175 |  |
Right-of-use asset | 1,079 |  |  |
Intersegment Operations [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
ASSETS | (885,662) | (502,184) |  |
CURRENT ASSETS | (961,987) | (705,152) |  |
NON-CURRENT ASSETS | 76,325 | 202,968 |  |
Long term assets | (296,879) | (164,473) |  |
Investments |  |  |  |
Property, plant and equipment |  |  |  |
Intangible assets | 373,204 | R$ 367,441 |  |
Right-of-use asset |  |  |  |
[1] | As of December 31, 2017, the joint ventures operating in the transmission segment had their electricity transmission concession agreements classified as financial assets within the scope of IAS 39 and IFRIC 12. With the entry into force on January 1, 2018 of IFRS 15, bringing the concept of the right to receive the infrastructure investments conditioned to the fulfillment of performance obligations to operate and maintain the infrastructure and not only by the passage of time, the electricity transmission concession agreements started being classified as contract assets. As a result, the balance of the financial assets of the joint ventures started being classified on January 1, 2018 as contract assets in accordance with the Company's practices, with a reduction in its measurement in the amount of R$148,748 with effect in the Company in the caption Investments, by equity. At the transition, the Company and its joint ventures opted to adopt the standard on the date of initial application as an adjustment to the opening balance, in equity account, considering only agreements outstanding prior to the date of application, as set forth in IFRS 15.

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