XML 89 R78.htm IDEA: XBRL DOCUMENT
v3.22.1

Commitments and Contingencies (Environmental Remediation) (Details) - SCE $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 USD ($) site | Mar. 31, 2021 USD ($)
Jointly Owned Utility Plant Interests [Line Items] |  |
Recorded estimated minimum liability | $ 264 |
Environmental remediation regulatory assets | 245 |
Expected recovery from incentive mechanism | $ 38 |
Expected recovery from incentive mechanism (percent) | 90.00% |
Recovery through customer rates | $ 207 |
Recovery through customer rates (percent) | 100.00% |
Environmental remediation expense | $ 2 | $ 2
Clean up (period) | 40 years |
Expected remediation costs, low end of range | $ 7 |
Expected remediation costs, high end of range | $ 26 |
Material sites |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Identified remediation sites (number) | site | 26 |
Minimum estimated liability | $ 1 |
Recorded estimated minimum liability | 260 |
Cost may exceed liability | 117 |
Material sites | San Onofre |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Recorded estimated minimum liability | $ 168 |
Immaterial sites |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Identified remediation sites (number) | site | 14 |
Recorded estimated minimum liability | $ 4 |
Cost may exceed liability | $ 9 |

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 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 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: | dtr-types: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: | dtr-types: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: | instant

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 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=121557415&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
- 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_JointlyOwnedUtilityPlantInterestsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Best estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (c),(d)(2) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 + Details
Name: | us-gaap_SiteContingencyLossExposureNotAccruedBestEstimate
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_MaterialSitesMember
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: |