Investments - Schedule of Changes in Investments in Subsidiaries Jointly Controlled Entities and Affiliates (Parenthetical) (Details) - BRL (R$) R$ in Millions		12 Months Ended
Dec. 01, 2021	Dec. 31, 2021
U F V Brasilandia Geracao De Energia Eletrica Distribuida [Member]
IfrsStatementLineItems [Line Items]
Acquisition of jointly controlled subsidiary		R$ 2
Itaocara Equity Deficit [Member]
IfrsStatementLineItems [Line Items]
Capital injected	R$ 40
Additional capital injected to cover expense	R$ 1
Madeira Energia Provisions To Losses [Member]
IfrsStatementLineItems [Line Items]
Loss recognized for extension of contractual obligation		R$ 162

The increase in investment property resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Investment property]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2023-01-01
-Paragraph 76
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2023-en-r&anchor=para_76_b&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2023-01-01
-Paragraph 79
-Subparagraph d
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2023-en-r&anchor=para_79_d_ii&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration