Income Tax Disclosures [Line Items]

No definition available.

Name:	eix_IncomeTaxDisclosuresLineItems
Namespace Prefix:	eix_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Tax Adjustments, Settlements, and Unusual Provisions, Before Tax

+ References

No definition available.

+ Details

Name:	eix_TaxAdjustmentsSettlementsandUnusualProvisionsBeforeTax
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase (decrease) during the reporting period in the asset created by the regulatory convention in which costs and revenues associated with certain utility expenses (such as fuel) are accumulated but on which no return is earned.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

+ Details

Name:	us-gaap_IncreaseDecreaseInBalancingAccountUtility
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28446-109314

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28511-109314

+ Details

Name:	us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_InternalRevenueServiceIRSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TaxPeriodAxis=eix_TaxYears2010to2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TaxPeriodAxis=eix_TaxYears2012to2014Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Income Taxes (Textual) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
Income Taxes (Textual) (Details) - USD ($) $ in Millions	Apr. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Southern California Edison
Income Tax Disclosure [Line Items]
Reduction in base revenue requirement balancing account	$ 234
IRS Examination \| Tax Years 2010 to 2012
Income Tax Disclosure [Line Items]
Tax liability			$ 94
IRS Examination \| Southern California Edison \| Tax Years 2012 to 2014
Income Tax Disclosure [Line Items]
Tax liability		$ (79)
Tax adjustments, pre tax		$ 133
IRS Examination \| Southern California Edison \| Tax Years 2010 to 2012
Income Tax Disclosure [Line Items]
Tax liability			$ 100