Income Taxes (Tax Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Effective Tax Rate
Income from continuing operations before income taxes	$ 412	$ 466	$ 837	$ 671
Provision for income tax at federal statutory rate of 35%	144	164	293	235
State tax, net of federal benefit	5	6	16	7
Property-related	(69)	(55)	(129)	(106)
Change related to uncertain tax positions	(77)	(21)	(62)	(14)
San Onofre OII settlement	0	0	0	(40)
Other	3	(10)	(5)	(17)
Total income tax expense from continuing operations	$ 6	$ 84	$ 113	$ 65
Effective tax rate	1.50%	18.00%	13.50%	9.70%
Federal statutory rate			35.00%
Southern California Edison
Effective Tax Rate
Income from continuing operations before income taxes	$ 419	$ 490	$ 860	$ 712
Provision for income tax at federal statutory rate of 35%	147	171	301	249
State tax, net of federal benefit	2	9	16	10
Property-related	(69)	(55)	(129)	(106)
Change related to uncertain tax positions	(75)	(17)	(65)	(10)
San Onofre OII settlement	0	0	0	(40)
Other	2	(10)	(8)	(17)
Total income tax expense from continuing operations	$ 7	$ 98	$ 115	$ 86
Effective tax rate	1.70%	20.00%	13.40%	12.10%
Federal statutory rate			35.00%