Compensation and Benefit Plans (Expense Components) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 49		$ 47		$ 40
Interest cost	98		108		115
Expected return on plan assets	(114)		(108)		(111)
Special termination benefits1	11		2		0
Amortization of prior service cost	(36)		(35)		(35)
Amortization of net loss2	24		39		26
Expense under accounting standards	32		53		35
Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	174		179
Interest cost	182		196
Southern California Edison | Postretirement Benefits Other Than Pensions
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	48		47		40
Interest cost	97		108		114
Expected return on plan assets	(114)		(109)		(111)
Special termination benefits1	11		2		0
Amortization of prior service cost	(35)		(35)		(35)
Amortization of net loss2	24		39		26
Expense under accounting standards	31		52		34
Southern California Edison | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	154		156
Interest cost	164		176
Continuing Operations [Member] | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	162		163		149
Interest cost	170		183		196
Expected return on plan assets	(222)		(217)		(226)
Settlement costs1	87	[1]	5	[1]	0	[1]
Amortization of prior service cost	5		3		7
Amortization of net loss2	39	[2]	61	[2]	25	[2]
Expense under accounting standards	241		198		151
Regulatory adjustment (deferred)	(53)		(19)		(28)
Total expense recognized	188		179		123
Continuing Operations [Member] | Southern California Edison | Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	159		160		145
Interest cost	167		180		192
Expected return on plan assets	(222)		(217)		(225)
Settlement costs1	85	[1]	4	[1]	0	[1]
Amortization of prior service cost	5		3		7
Amortization of net loss2	35	[2]	57	[2]	22	[2]
Expense under accounting standards	229		187		141
Regulatory adjustment (deferred)	(53)		(19)		(28)
Total expense recognized	$ 176		$ 168		$ 113

[1] Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International was $2 million for the year ended December 31, 2013.

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