Benefit Plans (Schedule Of Components Of Net Periodic Pension Cost) (Details) (Pension Plan [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 17	$ 22	$ 34	$ 43
Interest cost	86	79	172	157
Expected return on plan assets	(130)	(124)	(260)	(247)
Amortization of net loss	37	67	75	136
Amortization of prior service cost	2	2	5	5
Net Periodic Benefit Cost	$ 12	$ 46	$ 26	$ 94