XML 95 R77.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies (Permanent Retirement of San Onofre) (Details) - USD ($) $ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 20, 2017 | Jul. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2018 | Dec. 19, 2017
Loss Contingencies [Line Items] |  |  |  |  |
Regulatory assets |  |  | $ 4,914 | $ 5,046 |
The Utilities | Settled | Revised San Onofre Settlement Agreement |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Settlement agreement funding |  | $ 10 |  |  |
The Utilities | San Onofre |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Proceeds received |  |  | 72 |  |
The Utilities | San Onofre | MHI Arbitration regulatory liability |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Proceeds received |  |  | 47 |  |
The Utilities | San Onofre |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Regulatory assets |  |  |  |  | $ 775
Southern California Edison |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Regulatory assets |  |  | 4,914 | 5,046 |
Southern California Edison | San Onofre |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Public Utilities, Rate Related Customer Refund | $ 155 |  |  |  |
Southern California Edison | San Onofre |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Regulatory assets |  |  | $ 72 | $ 0 |

X
- Definition Funding Obligation + References No definition available. + Details
Name: | eix_FundingObligation
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Rate Related Customer Refund + References No definition available. + Details
Name: | eix_PublicUtilitiesRateRelatedCustomerRefund
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cash received for the settlement of litigation during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585 + Details
Name: | us-gaap_ProceedsFromLegalSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_SettledLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=eix_RevisedSanOnofreSettlementAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=eix_SanOnofreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=eix_ArbitrationWithMitsubishiHeavyIndustriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=eix_SanOnofreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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