Compensation and Benefit Plans (Expense Components) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax	$ 3		$ 2
Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	40		49		47
Interest cost	117		98		108
Expected return on plan assets	(108)		(114)		(108)
Special termination benefits	3	[1]	11	[1]	2	[1]
Amortization of prior service cost	(36)		(36)		(35)
Amortization of net loss	6		24		39
Expense under accounting standards	22		32		53
Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	133		174
Interest cost	181		182
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	9		11
Southern California Edison | Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	40		48		47
Interest cost	117		97		108
Expected return on plan assets	(108)		(114)		(109)
Special termination benefits	3	[1]	11	[1]	2	[1]
Amortization of prior service cost	(35)		(35)		(35)
Amortization of net loss	5		24		39
Expense under accounting standards	22		31		52
Southern California Edison | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	124		154
Interest cost	159		164
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	(4)		(7)
Continuing Operations | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	133		162		163
Interest cost	181		170		183
Expected return on plan assets	(229)		(222)		(217)
Settlement costs	45	[2]	87	[2]	5	[2]
Curtailment gain	(4)		0		0
Amortization of prior service cost	5		5		3
Amortization of net loss	12	[3]	39	[3]	61	[3]
Expense under accounting standards	143		241		198
Regulatory adjustment (deferred)	8		(53)		(19)
Total expense recognized	151		188		179
Continuing Operations | Southern California Edison | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	128		159		160
Interest cost	164		167		180
Expected return on plan assets	(213)		(222)		(217)
Settlement costs	42	[2]	85	[2]	4	[2]
Curtailment gain	0		0		0
Amortization of prior service cost	5		5		3
Amortization of net loss	7	[3]	35	[3]	57	[3]
Expense under accounting standards	133		229		187
Regulatory adjustment (deferred)	8		(53)		(19)
Total expense recognized	$ 141		$ 176		$ 168

[1] Due to the reduction in workforce, SCE has incurred costs for extended retiree health care coverage.

[2] Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International was $3 million and $2 million for the years ended December 31, 2014 and 2013, respectively.

[3] Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $9 million and $4 million, respectively, for the year ended December 31, 2014. The amount reclassified for Edison International and SCE was $11 million and $7 million, respectively, for the year ended December 31, 2013.