Public Utilities, Impact of Proposed Decision, Core Earnings, Increase (Decrease), Amount

No definition available.

Name:	eix_PublicUtilitiesImpactofProposedDecisionCoreEarningsIncreaseDecreaseAmount
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Impact of Proposed Decision, Increase (Decrease), Amount

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesImpactofProposedDecisionIncreaseDecreaseAmount
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Impact of Proposed Decision, Increase (Decrease), Net of Tax, Amount

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesImpactofProposedDecisionIncreaseDecreaseNetofTaxAmount
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Requested Conventional Return on Equity, Percentage

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedConventionalReturnonEquityPercentage
Namespace Prefix:	eix_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Requested Escalated Capital Additions, Year One, Percent

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedEscalatedCapitalAdditionsYearOnePercent
Namespace Prefix:	eix_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Requested Escalated Capital Additions, Year Two, Percent

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedEscalatedCapitalAdditionsYearTwoPercent
Namespace Prefix:	eix_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Requested Rate Amended, Suspension Term

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedRateAmendedSuspensionTerm
Namespace Prefix:	eix_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Requested Return on Equity, Effective Term

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedReturnonEquityEffectiveTerm
Namespace Prefix:	eix_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Requested Revenue Requirement, Year One

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedRevenueRequirementYearOne
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Requested Revenue Requirement, Year Two

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRequestedRevenueRequirementYearTwo
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Revenue Requirement

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRevenueRequirement
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Revenue Requirement Increase (Decrease), Amount

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRevenueRequirementIncreaseDecreaseAmount
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Revenue Requirement Increase (Decrease), Percent

+ References

No definition available.

+ Details

Name:	eix_PublicUtilitiesRevenueRequirementIncreaseDecreasePercent
Namespace Prefix:	eix_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of public utility's amended requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of public utility's requested return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RegulatoryAgencyAxis=eix_CaliforniaPublicUtilitiesCommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ProFormaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=eix_FederalEnergyRegulatoryCommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=eix_CaliforniaIndependentSystemOperatorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=eix_FederalEnergyRegulatoryCommissionandCaliforniaIndependentSystemOperatorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies (Regulatory Proceedings) (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended	15 Months Ended
	Jun. 12, 2019	Apr. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
CPUC \| Pro forma
Public Utilities, General Disclosures [Line Items]
Proposed decision escalate capital additions, year two percent					2.49%
CPUC \| Subsequent event \| Pro forma
Public Utilities, General Disclosures [Line Items]
Requested revenue requirement year one		$ (5,422)
Impact of proposed decision non-core impairment of utility property, plant and equipment		257
Impact of proposed decision non-core impairment of utility property, plant and equipment, net of tax		185
Impact of proposed decision non-core impairment of utility core earnings, net of tax		$ 130
Proposed decision escalate capital additions, year one, percent		2.49%
Requested revenue requirement year two		$ (5,823)
Southern California Edison
Public Utilities, General Disclosures [Line Items]
Requested revenue requirement year one				$ 5,534
Increase (decrease) in revenue requirement				$ (106)
Current effective retail base transmission revenue requirement			$ 1,000
Southern California Edison \| Subsequent event \| Forecast
Public Utilities, General Disclosures [Line Items]
Increase (decrease) in revenue requirement	$ 290
Southern California Edison \| CPUC \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Requested revenue requirement year one		5,102
Increase (decrease) in revenue requirement		$ (432)
Southern California Edison \| FERC
Public Utilities, General Disclosures [Line Items]
Increase (decrease) in revenue requirement			$ (131)
Decrease in revenue requirement percent			11.00%
FERC Base ROE				10.30%
Southern California Edison \| FERC \| Subsequent event \| Forecast
Public Utilities, General Disclosures [Line Items]
FERC Base ROE		17.12%
Conventional ROE		11.12%
Additional ROE		6.00%
Effective term		60 days
Suspension term		5 months
Southern California Edison \| CAISO \| Subsequent event \| Forecast
Public Utilities, General Disclosures [Line Items]
Additional ROE		0.50%
Southern California Edison \| FERC and CAISO \| Subsequent event \| Forecast
Public Utilities, General Disclosures [Line Items]
FERC Base ROE		18.40%