Compensation and Benefit Plans (Textual) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 45
Estimated future contributions in remainder of year	76
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	30
Estimated future contributions in remainder of year	29
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	38
Estimated future contributions in remainder of year	$ 54