Compensation and Benefit Plans (Textual) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	$ 47
Estimated future contributions in remainder of year	73
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Employer contributions	17
Estimated future contributions in remainder of year	16
Southern California Edison | Pension Plans
Pension and Other Postretirement Benefits
Employer contributions	37
Estimated future contributions in remainder of year	$ 58