XML 85 R73.htm IDEA: XBRL DOCUMENT
v3.19.2

Commitments and Contingencies (Environmental Remediation) (Details) - Southern California Edison $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2019 USD ($) site | Jun. 30, 2018 USD ($)
Schedule Of Commitments And Contingencies [Line Items] |  |
Minimum liability for environmental remediation | $ 137 |
Regulatory assets related to environmental remediation | 132 |
Portion of recorded liability recoverable from incentive mechanism | $ 41 |
Percentage of environmental remediation costs recoverable through an incentive mechanism (as a percent) | 90.00% |
Liability incurred at majority of the remaining sites through customer rates | $ 91 |
Environmental remediation costs to be recovered (as a percent) | 100.00% |
Amount that cleanup costs could exceed recorded liability for identified material sites | $ 141 |
Amount that cleanup costs could exceed recorded liability for immaterial sites | $ 7 |
Clean up (period) | 30 years |
Remediation cost estimates (period) | 5 years |
Expected remediation costs for each of the next four years, low end of range | $ 7 |
Expected remediation costs for each of the next four years, high end of range | 18 |
Environmental remediation costs | $ 2 | $ 6
Material sites |  |
Schedule Of Commitments And Contingencies [Line Items] |  |
Identified material sites for environmental remediation (in number of sites) | site | 21 |
Minimum costs to be identified site | $ 1 |
Minimum liability for environmental remediation | 133 |
Material sites | San Onofre |  |
Schedule Of Commitments And Contingencies [Line Items] |  |
Minimum liability for environmental remediation | $ 88 |
Immaterial sites |  |
Schedule Of Commitments And Contingencies [Line Items] |  |
Immaterial sites for environmental remediation (in number of sites) | site | 15 |
Immaterial sites | Minimum |  |
Schedule Of Commitments And Contingencies [Line Items] |  |
Minimum liability for environmental remediation | $ 4 |

X
- Definition The potential estimated cleanup costs for identified material sites in excess of the minimum liability that is accrued as of the balance sheet date for environmental loss contingencies. + References No definition available. + Details
Name: | eix_AmountThatCleanupCostsForIdentifiedMaterialSitesCouldExceedRecordedLiability
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The potential estimated cleanup costs for immaterial sites in excess of the minimum liability that is accrued as of the balance sheet date for environmental loss contingencies. + References No definition available. + Details
Name: | eix_AmountThatCleanupCostsForImmaterialSitesCouldExceedRecordedLiability
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The high end of the range of expected remediation costs in each of the next several years. + References No definition available. + Details
Name: | eix_ExpectedAnnualEnvironmentalRemediationCostsOverFourYearsHighEndofRange
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The low end of the range of expected remediation costs in each of the next several years. + References No definition available. + Details
Name: | eix_ExpectedAnnualEnvironmentalRemediationCostsOverFourYearsLowEndofRange
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Annual Environmental Remediation Costs, Period for Cost Estimates + References No definition available. + Details
Name: | eix_ExpectedAnnualEnvironmentalRemediationCostsPeriodforCostEstimates
Namespace Prefix: | eix_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum Expected Period for Clean Up of Identified Sites + References No definition available. + Details
Name: | eix_MaximumExpectedPeriodForCleanUpOfIdentifiedSites
Namespace Prefix: | eix_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The upper end of the range of a site's cost estimate must be at least this amount to be classified as a material identified site. Below this amount an identified site will be an immaterial site. + References No definition available. + Details
Name: | eix_MinimumCoststobeIdentifiedSite
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of immaterial identified sites which have a recorded environmental remediation liability as the costs can be estimated and are probable. + References No definition available. + Details
Name: | eix_NumberOfImmaterialSitesForEnvironmentalRemediation
Namespace Prefix: | eix_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of material identified sites which have a recorded environmental remediation liability as the costs can be estimated and are probable. + References No definition available. + Details
Name: | eix_NumberOfSitesIdentifiedForEnvironmentalRemediation
Namespace Prefix: | eix_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of environmental remediation costs entity will recover through incentive mechanism. + References No definition available. + Details
Name: | eix_PercentageOfEnvironmentalRemediationCostsRecoverableFromIncentiveMechanism
Namespace Prefix: | eix_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of environmental remediation costs to be recovered. + References No definition available. + Details
Name: | eix_PercentageOfEnvironmentalRemediationCostsToBeRecovered
Namespace Prefix: | eix_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of the recorded liability for environmental remediation costs recoverable through incentive mechanism. + References No definition available. + Details
Name: | eix_PortionOfRecordedLiabilityRecoverableFromIncentiveMechanism
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the recorded liability incurred at majority of the remaining sites through customer rates. + References No definition available. + Details
Name: | eix_RecordedLiabilityIncurredAtMajorityOfRemainingSitesThroughCustomerRates
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Assets, Noncurrent, Environmental Remediation + References No definition available. + Details
Name: | eix_RegulatoryAssetsNoncurrentEnvironmentalRemediation
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Schedule Of Commitments And Contingencies [Line Items] + References No definition available. + Details
Name: | eix_ScheduleOfCommitmentsAndContingenciesLineItems
Namespace Prefix: | eix_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 + Details
Name: | us-gaap_AccrualForEnvironmentalLossContingencies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109237650&loc=d3e13064-110858 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 + Details
Name: | us-gaap_EnvironmentalRemediationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=eix_MaterialSitesDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=eix_ImmaterialSitesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |