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1. Operations (Details 2) - Joint Operation	12 Months Ended
	Dec. 31, 2018
Disclosure of joint operations [line items]
Joint operation name	Hydroelectric Power Plant Gov. Jayme Canet Júnior (Mauá)
Interest	51.00%
Other consortium members	Eletrosul Centrais Elétricas S.A. (49%)
Joint operation name	Hydroelectric Power Plant Baixo Iguaçu (Note 18.5.1) (a)
Interest	30.00%
Other consortium members	Geração Céu Azul S.A (subsidiarie of Neoenergia S.A.) (70%)

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The name of a joint operation. [Refer: Joint operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph 21
-Subparagraph a
-Clause i
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-URIDate 2018-03-16

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The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]]

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