Compensation and Benefit Plans (Expected Future Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Pension Plans
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected Future Benefit Payments - 2014	$ 265
Expected Future Benefit Payments - 2015	240
Expected Future Benefit Payments - 2016	249
Expected Future Benefit Payments - 2017	254
Expected Future Benefit Payments - 2018	257
Expected Future Benefit Payments - 2019 - 2023	1,323
Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected Future Benefit Payments - 2014	92
Expected Future Benefit Payments - 2015	101
Expected Future Benefit Payments - 2016	107
Expected Future Benefit Payments - 2017	113
Expected Future Benefit Payments - 2018	119
Expected Future Benefit Payments - 2019 - 2023	668
Southern California Edison \| Pension Plans
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected Future Benefit Payments - 2014	202
Expected Future Benefit Payments - 2015	208
Expected Future Benefit Payments - 2016	214
Expected Future Benefit Payments - 2017	219
Expected Future Benefit Payments - 2018	227
Expected Future Benefit Payments - 2019 - 2023	1,196
Southern California Edison \| Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected Future Benefit Payments - 2014	92
Expected Future Benefit Payments - 2015	100
Expected Future Benefit Payments - 2016	106
Expected Future Benefit Payments - 2017	113
Expected Future Benefit Payments - 2018	119
Expected Future Benefit Payments - 2019 - 2023	$ 666

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

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant