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v3.10.0.1

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Discounts and issuance costs of long term debt | $ (63) | $ 1
Southern California Edison Company |  |
Discounts and issuance costs of long term debt | $ (58) | $ 10

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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: |
Data Type: | na
Balance Type: |
Period Type: |