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Summary of Significant Accounting Policies (Details) (Southern California Edison, Electric Utility) | 6 Months Ended
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Jun. 30, 2014 sqmi
Southern California Edison | Electric Utility |
Summary of Significant Accounting Policies [Line Items] |
Supply of electricity, area covered (square mile) | 50,000

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- Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Supply Of Electricity Area Covered 1 + References No definition available. + Details
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Namespace Prefix: | eix_
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