Commitments and Contingencies (Contingencies Textual) (Details) (USD $)	1 Months Ended	12 Months Ended		1 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended			12 Months Ended		12 Months Ended			1 Months Ended
	Jun. 30, 2010	Dec. 31, 2013 Nuclear Insurance	Dec. 31, 2013 Edison International sites	Dec. 31, 2011 Southern California Edison	Jun. 30, 2010 Southern California Edison	Dec. 31, 2013 Southern California Edison sites	Dec. 31, 2012 Southern California Edison	Dec. 31, 2011 Southern California Edison	Oct. 31, 2011 Southern California Edison Alleged violations of PSD requirements and New Source Performance Standards of the CAA plaintiffs	Dec. 31, 2013 Southern California Edison Nuclear Insurance	Dec. 31, 2013 SCE and other owners of San Onofre and Palo Verde Nuclear Insurance	Aug. 31, 2013 San Onofre (nuclear)	Dec. 31, 2013 San Onofre (nuclear) Southern California Edison	Aug. 31, 2013 San Onofre (nuclear) Southern California Edison	Dec. 31, 2013 San Onofre and Palo Verde SCE and other owners of San Onofre and Palo Verde Nuclear Insurance	Dec. 31, 2013 Dividends Paid By EME to Holdings [Member] Eme Chapter 11 Bankruptcy Filing [Member]	Dec. 31, 2013 Amount Paid By EME Under Tax Allocation Scheme [Member] Eme Chapter 11 Bankruptcy Filing [Member]	Jun. 30, 2010 Amount Returned To Customers [Member] Southern California Edison	Jun. 30, 2010 Amount Returned To Shareholders [Member] Southern California Edison
Schedule Of Commitments And Contingencies [Line Items]
Notice Of Claim Amount												$ 397,000,000		$ 311,000,000		$ 925,000,000	$ 183,000,000
Number of plaintiffs (entities)									4
Identified material sites for environmental remediation (in number of sites)			19
Minimum costs to be Identified Site			1,000,000
Immaterial sites for environmental remediation (in number of sites)						39
Minimum liability for environmental remediation for material sites						110,000,000							73,000,000
Immaterial sites, range of liability, minimum						4,000,000
Environmental remediation liability						114,000,000
Regulatory assets related to environmental remediation						110,000,000
Portion of recorded liability recoverable from incentive mechanism						36,000,000
Percentage of environmental remediation costs recoverable through an incentive mechanism (as a percent)						90.00%
Environmental remediation costs to be recovered (as a percent)						100.00%
Liability incurred at majority of the remaining sites through customer rates						74,000,000
Amount that cleanup costs could exceed recorded liability for identified material sites						162,000,000
Amount that cleanup costs could exceed recorded liability for immaterial sites						7,000,000
Maximum expected period for cleanup of identified sites (in years)						30 years
Expected annual environmental remediation costs, low end of range						6,000,000
Expected annual environmental remediation costs, high end of range						27,000,000
Environmental remediation costs						8,000,000	10,000,000	16,000,000
Federal limit on public liability claims from nuclear incident, approximate		13,600,000,000
Private primary insurance purchased											375,000,000
Maximum assessment per each nuclear incident										255,000,000
Maximum yearly assessment per nuclear incident										38,000,000
Loss limit, property damage insurance															500,000,000
Loss limit, property damage insurance, federal minimum requirement															1,060,000,000
Limit on assessment of retrospective premium adjustments, per year, approximate										52,000,000
Insurance coverage for wildfire liabilities Limit						500,000,000
Self insurance retention per wildfire occurrence						10,000,000
Insurance Coverage For Wildfires Additional Limit						450,000,000
Wildfire Threshold For Additional Coverage						550,000,000
Amount of damages, decision by US Court of Federal Claims, spent nuclear fuel litigation	142,000,000				112,000,000													94,000,000	18,000,000
Damages sought				$ 98,000,000									$ 4,000,000,000