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v2.4.1.9

Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Discounts and issuance costs of long term debt | $ 6 eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt | $ 18 eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt | $ 4 eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt
Southern California Edison |  |  |
Discounts and issuance costs of long term debt | $ 2 eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | $ 18 eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | $ 4 eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember

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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: | dei_LegalEntityAxis=eix_SouthernCaliforniaEdisonCompanyMember
Namespace Prefix: |
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Balance Type: |
Period Type: |