Compensation and Benefit Plans (Textual) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 98
Estimated future contributions in remainder of year	22
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	25
Estimated future contributions in remainder of year	8
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	81
Estimated future contributions in remainder of year	$ 14