Name:	bhe_ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsOrLiabilitiesNet
Namespace Prefix:	bhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The net change in regulatory assets and liabilities related to derivatives not designated as hedging instruments and used for regulated utility operations as a result of losses and gains on those derivatives that were reclassified to regulated cost of fuel, energy and capacity during the period.

No definition available.

Name:	bhe_NetGainsLossesReclassifiedToCostOfDomesticRegulatedElectric
Namespace Prefix:	bhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The net change in regulatory assets and liabilities related to derivatives not designated as hedging instruments and used for domestic regulated operations as a result of losses and gains on those derivatives that were reclassified to operating revenue during the period.

No definition available.

Name:	bhe_NetGainsLossesReclassifiedToOperatingRevenue
Namespace Prefix:	bhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The net amount of regulatory assets and liabilities as of the balance sheet date representing the net effective portion of unrealized losses and gains on derivatives not designated as hedging instruments and used for domestic regulated operations. Unrealized losses and gains on derivatives used for domestic regulated operations are generally recorded as regulatory assets or liabilities due to the realized losses and gains on such derivatives being included in regulated rates.

No definition available.

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

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.

No definition available.

Name:	bhe_RegulatoryAssetsLiabilitiesNetUnrealizedLossGainNetOnDerivativeInstrumentsLineItems
Namespace Prefix:	bhe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611