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v3.21.1

Summary of Significant Accounting Policies (Organization (Details) | 3 Months Ended
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Mar. 31, 2021 mi²
SCE |
Segment Reporting Information [Line Items] |
Supply of electricity area covered (in square miles) | 50,000

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- Definition Supply Of Electricity Area Covered 1 + References No definition available. + Details
Name: | eix_SupplyOfElectricityAreaCovered1
Namespace Prefix: | eix_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

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- 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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=eix_SouthernCaliforniaEdisonCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |