Compensation and Benefit Plans (Textual) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 76
Estimated future contributions in remainder of 2014	136
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	7
Estimated future contributions in remainder of 2014	8
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	63
Estimated future contributions in remainder of 2014	123
Employee severance | Southern California Edison
Pension and Other Postretirement Benefits
Estimated cash severance payments	$ 222