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Summary of Significant Accounting Policies (Details) mi² in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended | 33 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Sep. 30, 2015 USD ($) mi² | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($)
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment and other charges | $ 0 |  | $ (3) |  | $ 0 | $ 228 |
Southern California Edison |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment and other charges | $ 0 |  | $ 0 |  | $ 0 | $ 231 |
Southern California Edison | Electric Utility |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Supply of electricity, area covered (square mile) | mi² |  |  |  |  | 50 |  |
San Onofre | Southern California Edison |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment and other charges |  | $ 163 |  | $ 231 |  |  | $ 738
Asset impairment net of tax |  | $ 72 |  | $ 96 |  |  | $ 437

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- Definition Asset impairment and other charges + References No definition available. + Details
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Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Asset impairment net of tax + References No definition available. + Details
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Namespace Prefix: | eix_
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Balance Type: | debit
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- Definition These concepts are used to disclose significant accounting policies associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Supply Of Electricity Area Covered 1 + References No definition available. + Details
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- Details
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- Details
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- Details
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