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Commitments and Contingencies (Nuclear Insurance) (Details) - Nuclear Insurance | 9 Months Ended
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Sep. 30, 2016 USD ($)
Schedule Of Commitments And Contingencies [Line Items] |
Federal limit on public liability claims from nuclear incident, approximate | $ 13,400,000,000
SCE and other owners of San Onofre and Palo Verde | San Onofre and Palo Verde |
Schedule Of Commitments And Contingencies [Line Items] |
Loss limit, property damage insurance, federal minimum requirement | 1,060,000,000
Southern California Edison |
Schedule Of Commitments And Contingencies [Line Items] |
Limit on assessment of retrospective premium adjustments, per year, approximate | 52,000,000
Maximum assessment per each nuclear incident | 255,000,000
Maximum yearly assessment per nuclear incident | $ 38,000,000

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- Definition The approximate maximum amount of public liability, as limited by federal law, resulting from a nuclear incident. + References No definition available. + Details
Name: | eix_FederalLimitOnPublicLiabilityClaimsFromNuclearIncidentApproximate
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The approximate maximum yearly retrospective premium adjustments that could be assessed against the entity. + References No definition available. + Details
Name: | eix_LimitOnAssessmentOfRetrospectivePremiumAdjustmentsPerYearApproximate
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Loss Limit, Property Damage Insurance, Federal Minimum Requirement + References No definition available. + Details
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Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The maximum amount of deferred insurance premium based on each nuclear incident occurring. + References No definition available. + Details
Name: | eix_MaximumDeferredInsurancePremiumPerNuclearIncident
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The maximum amount of additional insurance premium per yearly assessment charged for each nuclear incident. + References No definition available. + Details
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Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
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- Definition Schedule Of Commitments And Contingencies [Line Items] + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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