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Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Statement of Cash Flows [Abstract] |  |  |
Premiums, discounts and issuance costs of long term debt | $ 18 | $ 4 | $ 9

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- Definition Premiums Discounts and Issuance Costs of Long Term Debt + 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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- Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration