INVESTMENTS - Additional Information (Details) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Santo Antnio Energia S.A.
Investments in subsidiaries, joint ventures and associates [abstract]
Collateral in guarantee	R$ 769,897
Other provisions	492,017
Deferred amount of other claims with an additional amount estimated	226,000
Furnas
Investments in subsidiaries, joint ventures and associates [abstract]
Provision for short liabilities	R$ 705,864
Norte Energia S.A - NESA
Investments in subsidiaries, joint ventures and associates [abstract]
Percentage of participation	49.98%	49.98%
Recoverable value of investment	R$ 8,124,808
Recorded book value of investment	16,256,118
Amount of investment to reach 100% of investment	R$ 6,384,303
Madeira Energia S.A.
Investments in subsidiaries, joint ventures and associates [abstract]
Percentage of participation	43.00%	43.00%
Recorded book value of investment		R$ 906,289
Madeira Energia S.A. \| Furnas
Investments in subsidiaries, joint ventures and associates [abstract]
Percentage of participation	43.06%

Deferred amount of other claims with an additional amount estimated.

No definition available.

Name:	ebr_DeferredAmountOfOtherClaimsWithAdditionalAmountEstimated
Namespace Prefix:	ebr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of investment to reach 100% of investment of investment accounted for using equity method.

+ References

No definition available.

+ Details

Name:	ebr_InvestmentAccountedForUsingEquityMethodAmountOfInvestmentToReach100OfInvestment
Namespace Prefix:	ebr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The gross amount of investments accounted for using the equity method.

+ References

No definition available.

+ Details

Name:	ebr_InvestmentAccountedForUsingEquityMethodGross
Namespace Prefix:	ebr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of recoverable value of investment accounted for using equity method.

+ References

No definition available.

+ Details

Name:	ebr_InvestmentAccountedForUsingEquityMethodRecoverableValue
Namespace Prefix:	ebr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

It represents the proportion of ownership interest in associates and joint ventures.

+ References

No definition available.

+ Details

Name:	ebr_ProportionOfOwnershipInterestInAssociatesAndJointVentures
Namespace Prefix:	ebr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of provision for short liabilities.

+ References

No definition available.

+ Details

Name:	ebr_ProvisionForShortLiabilities
Namespace Prefix:	ebr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 14
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_14_a&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of provisions other than provisions for employee benefits. [Refer: Provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2021-01-01
-Paragraph 84
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84_a&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 78
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_d&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_OtherProvisions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ebr_SantoAntnioEnergiaS.a.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=ebr_FurnasCentraisEletricasS.a.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_JointVenturesAxis=ebr_NorteEnergiaS.a.NesaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_JointVenturesAxis=ebr_MadeiraEnergiaS.a.MesaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: