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v3.8.0.1

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Discounts and issuance costs of long term debt | $ 17 | $ 11
Southern California Edison Company |  |
Discounts and issuance costs of long term debt | $ 11 | $ 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_
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Balance Type: | debit
Period Type: | duration

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