General - BHE (Details)	3 Months Ended
Mar. 31, 2026 company operatingSegment state
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments \| operatingSegment	8
Number of owned and operated utility companies in the United States	4
Number of states owned and operated utility companies serve customers \| state	11
Number of owned and operated electricity distribution companies in Great Britain	2
Number of owned and operated interstate natural gas pipeline companies in the United States	5
Number of owned and operated residential real estate brokerage franchise networks in the United States	1

Number of owned and operated electricity distribution companies in Great Britain.

No definition available.

Name:	bhe_NumberOfOwnedAndOperatedElectricityDistributionCompaniesGreatBritain
Namespace Prefix:	bhe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of owned and operated interstate natural gas pipeline companies in the United States.

+ References

No definition available.

+ Details

Name:	bhe_NumberOfOwnedAndOperatedInterstateNaturalGasPipelineCompaniesUnitedStates
Namespace Prefix:	bhe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of owned and operated real estate franchise networks In the United States.

+ References

No definition available.

+ Details

Name:	bhe_NumberOfOwnedAndOperatedRealEstateFranchiseNetworksInTheUnitedStates
Namespace Prefix:	bhe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of owned and operated utility companies in the United States.

+ References

No definition available.

+ Details

Name:	bhe_NumberOfOwnedAndOperatedUtilityCompaniesUnitedStates
Namespace Prefix:	bhe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of states owned and operated utility companies serve customers.

+ References

No definition available.

+ Details

Name:	bhe_NumberOfStatesOwnedAndOperatedUtilityCompanies
Namespace Prefix:	bhe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration