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38. Insurance (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2018 BRL (R$)
Nominated Risks
Disclosure of types of insurance contracts [line items]
Term of validity	Aug. 24, 2019
Insured amount	R$ 2,226,749
Operational risks - UHE Colíder
Disclosure of types of insurance contracts [line items]
Term of validity	Nov. 01, 2019
Insured amount	R$ 988,398
Operational risks - UEG Araucária
Disclosure of types of insurance contracts [line items]
Term of validity	Nov. 30, 2019
Insured amount	R$ 849,558
Operational risks - HPP Governador Jayme Canet Junior
Disclosure of types of insurance contracts [line items]
Term of validity	Nov. 23, 2019
Insured amount	R$ 799,290
Operational risks - Brisa Potiguar
Disclosure of types of insurance contracts [line items]
Term of validity	Jun. 27, 2019
Insured amount	R$ 770,713
Fire - Company-owned and rented facilities
Disclosure of types of insurance contracts [line items]
Term of validity	Aug. 24, 2019
Insured amount	R$ 619,414
Operational risks - São Bento
Disclosure of types of insurance contracts [line items]
Term of validity	Jun. 27, 2019
Insured amount	R$ 489,357
Multi-risk - Elejor
Disclosure of types of insurance contracts [line items]
Term of validity	Mar. 11, 2020
Insured amount	R$ 302,616
Legal guarantee - Office of the General Counsel to the National Treasury
Disclosure of types of insurance contracts [line items]
Term of validity	May 10, 2020
Insured amount	R$ 326,712

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- References

No definition available.

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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.

+ References

No definition available.

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- Definition

The amount of expense arising from purchased insurance.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

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