Commitments and Contingencies (Details) (USD $)	1 Months Ended		1 Months Ended		3 Months Ended				1 Months Ended	3 Months Ended				3 Months Ended	1 Months Ended
	Jun. 30, 2010	Sep. 01, 2013	Dec. 31, 2011 Southern California Edison	Jun. 30, 2010 Southern California Edison	Mar. 31, 2014 Southern California Edison sites	Mar. 31, 2013 Southern California Edison	Sep. 01, 2013 Southern California Edison	Feb. 28, 2014 San Gabriel Windstorm Investigation Southern California Edison	Oct. 31, 2011 Alleged violations of PSD requirements and New Source Performance Standards of the CAA Southern California Edison plaintiffs	Mar. 31, 2014 Nuclear Insurance	Mar. 31, 2014 Nuclear Insurance Southern California Edison	Mar. 31, 2014 Nuclear Insurance SCE and other owners of San Onofre and Palo Verde	Mar. 31, 2014 San Onofre (nuclear) Southern California Edison	Mar. 31, 2014 San Onofre and Palo Verde Nuclear Insurance SCE and other owners of San Onofre and Palo Verde	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]
Loss Contingency, Estimate of Possible Loss								$ 24,500,000
Loss Contingency, Number of Plaintiffs									4
Identified material sites for environmental remediation (in number of sites)					19
Minimum costs to be Identified Site					1,000,000
Minimum liability for environmental remediation for material sites					112,000,000								73,000,000
Immaterial sites for environmental remediation (in number of sites)					39
Immaterial sites, range of liability, minimum					4,000,000
Environmental remediation liability					116,000,000
Regulatory assets related to environmental remediation					112,000,000
Portion of recorded liability recoverable from incentive mechanism					37,000,000
Percentage of environmental remediation costs recoverable through an incentive mechanism (as a percent)					90.00%
Liability incurred at majority of the remaining sites through customer rates					74,000,000
Environmental remediation costs to be recovered (as a percent)					100.00%
Amount that cleanup costs could exceed recorded liability for identified material sites					161,000,000
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					32,000,000
Environmental remediation costs					1,000,000	2,000,000
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			450,000,000
Self insurance retention per wildfire occurrence							10,000,000
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