Property, Plant and Equipment, Net - EEGH (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Plant, net	$ 9,872	$ 9,934
Construction work- in-progress	227	210
Property, plant and equipment, net	10,099	10,144
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	8,499	8,497
Accumulated depreciation and amortization	(2,792)	(2,759)
Plant, net	5,707	5,738
Construction work- in-progress	211	196
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	4,485	4,479
Accumulated depreciation and amortization	(320)	(283)
Plant, net	4,165	4,196
Interstate natural gas pipeline assets [Member] \| Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	$ 8,385	8,382
Interstate natural gas pipeline assets [Member] \| Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	24 years
Interstate natural gas pipeline assets [Member] \| Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	43 years
Intangible plant [Member] \| Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	$ 114	115
Intangible plant [Member] \| Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Intangible plant [Member] \| Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	10 years
Intangible plant [Member] \| Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	14 years
Plant in service, net	$ 25	25
LNG facility [Member] \| Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	40 years
Plant in service, net	$ 4,460	$ 4,454

Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress

No definition available.

Name:	bhe_PublicUtilitiesPropertyPlantandEquipmentNetExcludingConstructionWorkInProgress
Namespace Prefix:	bhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress

+ References

No definition available.

+ Details

Name:	bhe_PublicUtilitiesPropertyPlantandEquipmentPlantinServiceExcludingConstructionWorkInProgress
Namespace Prefix:	bhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period end amount of construction work in progress in public utility.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Period end amount of total net PPE.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=bhe_EasternEnergyGasHoldingsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_RegulatedOperationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_UnregulatedOperationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_PipelinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OtherIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=bhe_LNGFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: