Pension, OPEB and Savings Plans (Amounts Expected To Be Amortized From Accumulated OCL, Regulatory Assets And Deferred Assets Into Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (Gain) Loss	$ 188	$ 2,174	[1]	$ 1,991	[1]
Prior Service Cost	(19)	(19)		(11)
Transition Obligation		0		0
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial (Gain) Loss	43	527	[1]	390	[1]
Prior Service Cost	(14)	(14)		(13)
Transition Obligation		$ (2)		$ (4)

[1] Includes $827 million ($485 million, after-tax) and $745 million ($438 million, after-tax) in Accumulated Other Comprehensive Loss related to Pension and OPEB as of December 31, 2012 and 2011, respectively.