Pension, OPEB and Savings Plans (Changes In The Benefit Obligation And The Fair Value Of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at End of Year	$ 5,435		$ 4,610
Pension Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	5,235	[1]	4,572	[1]
Service Cost	116		101		92
Interest Cost	215		223		228
Actuarial (Gain) Loss	(501)		586
Gross Benefits Paid	(253)		(248)
Medicare Subsidy Receipts	0		0
Special Termination Benefits	0		1
Benefit Obligation at End of Year	4,812	[1]	5,235	[1]	4,572	[1]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year	4,357		3,831
Actual Return on Plan Assets	857		541
Employer Contributions	155		233
Gross Benefits Paid	(253)		(248)
Medicare Subsidy Receipts	0		0
Fair Value of Assets at End of Year	5,116		4,357		3,831
Funded Status (Plan Assets less Benefit Obligation)	304		(878)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent Assets	(434)		(6)
Current Accrued Benefit Cost	(9)		(8)
Noncurrent Accrued Benefit Cost	(121)		(876)
Amounts Recognized	304		(878)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Prior Service Cost	(120)	[2]	(139)	[2]
Net Actuarial Loss	977	[2]	2,174	[2]
Total	(857)		(2,035)
Accumulated Other Comprehensive Loss related to Pension and OPEB, before tax	408		827
Accumulated Other Comprehensive Loss related to Pension and OPEB, after tax	238		485
Other Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	1,538	[1]	1,338	[1]
Service Cost	21		17		14
Interest Cost	63		65		61
Actuarial (Gain) Loss	(144)		182
Gross Benefits Paid	(64)		(69)
Medicare Subsidy Receipts	0		5
Special Termination Benefits	0		0
Benefit Obligation at End of Year	1,414	[1]	1,538	[1]	1,338	[1]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Assets at Beginning of Year	253		211
Actual Return on Plan Assets	52		31
Employer Contributions	78		75
Gross Benefits Paid	(64)		(69)
Medicare Subsidy Receipts	0		5
Fair Value of Assets at End of Year	319		253		211
Funded Status (Plan Assets less Benefit Obligation)	(1,095)		(1,285)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent Assets	0		0
Current Accrued Benefit Cost	0		0
Noncurrent Accrued Benefit Cost	(1,095)		(1,285)
Amounts Recognized	(1,095)		(1,285)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Prior Service Cost	(53)	[2]	(67)	[2]
Net Actuarial Loss	310	[2]	527	[2]
Total	$ (257)		$ (460)

[1] Represents projected benefit obligation for pension benefits and the accumulated postretirement benefit obligation for Other benefits.

[2] Includes $408 million ($238 million, after-tax) and $827 million ($485 million, after-tax) in Accumulated Other Comprehensive Loss related to Pension and OPEB as of December 31, 2013 and 2012, respectively.