Property, Plant and Equipment (Textual) (Details) (Southern California Edison, USD $)	12 Months Ended					1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Minimum Capitalized Software Costs	Dec. 31, 2013 Maximum Capitalized Software Costs	Dec. 31, 2013 Four Corners Unit 4 And 5 (coal)	Dec. 31, 2013 Four Corners Unit 4 And 5 (coal)
Property, Plant and Equipment [Line Items]
Estimated Useful Lives				5 years	15 years
Capitalized software costs	$ 1,600,000,000	$ 1,500,000,000
Capitalized software, accumulated amortization	839,000,000	651,000,000
Capitalized software, amortization expense	251,000,000	217,000,000	156,000,000
Capitalized software, estimated amortization expense 2014 through 2018	255,000,000
Sale price of investment in facility						181,000,000
Gain on sale of investment in facility							$ 166,000,000