Compensation and Benefit Plans (Textual) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 113
Estimated future contributions in remainder of year	14
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	45
Estimated future contributions in remainder of year	14
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	96
Estimated future contributions in remainder of year	$ 2