Compensation and Benefit Plans (Textual) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 155
Estimated future contributions in remainder of 2014	7
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	11
Estimated future contributions in remainder of 2014	4
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	131
Estimated future contributions in remainder of 2014	2
Employee severance | Southern California Edison
Pension and Other Postretirement Benefits
Estimated cash severance payments	$ 222