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24 Sectorial Charges Payable (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfCustomerChargesDueLineItems [Line Items]
Sectorial charges due	R$ 33,712	R$ 28,508
Energy development account (CDE) [member]
DisclosureOfCustomerChargesDueLineItems [Line Items]
Sectorial charges due	5,700	4,104
Global reversal reserve (RGR) [member]
DisclosureOfCustomerChargesDueLineItems [Line Items]
Sectorial charges due	12,446	12,068
Tariff flags [member]
DisclosureOfCustomerChargesDueLineItems [Line Items]
Sectorial charges due	R$ 15,566	R$ 12,336

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The amount of current payables due to related parties. [Refer: Related parties [member]; Payables to related parties]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78&doctype=Standard
-URIDate 2020-01-01

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