Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss):
Unrealized holding gain (loss) arising during the period	$ 0		$ (21)		$ (12)
Prior service cost (credit) arising during the period	0		(5)		0
Increase (Decrease) in Accumulated Other Comprehensive Income
Balance at the beginning of period	(87)		(100)	[1]
Other	2		0
Change	74		13
Balance at the end of period	(13)		(87)		(100)	[1]
Unrealized Gain (Loss) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss):
Unrealized holding gain (loss) arising during the period					34
Pension and PBOP – Prior Service Cost
Accumulated Other Comprehensive Income (Loss):
Prior service cost (credit) arising during the period					5
Pension and PBOP – Net Loss
Increase (Decrease) in Accumulated Other Comprehensive Income
Other comprehensive income (loss) before reclassifications	63		15
Reclassified from accumulated other comprehensive income	9	[2]	(2)	[2]
Southern California Edison
Increase (Decrease) in Accumulated Other Comprehensive Income
Balance at the beginning of period	(29)		(24)
Other	2		0
Change	18		(5)
Balance at the end of period	(11)		(29)
Southern California Edison | Pension and PBOP – Net Loss
Increase (Decrease) in Accumulated Other Comprehensive Income
Other comprehensive income (loss) before reclassifications	13		(9)
Reclassified from accumulated other comprehensive income	$ 3	[2]	$ 4	[2]

[1] Excludes the amount of unrealized losses from cash flow hedges and prior service costs arising from pension and PBOP.

[2] These items are included in the computation of net periodic pension and PBOP expense.