Benefit Plans (Schedule Of Components Of Net Periodic Pension Cost) (Details) (Pension Plan [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 17	$ 22	$ 51	$ 65
Interest cost	86	78	258	235
Expected return on plan assets	(129)	(123)	(389)	(370)
Amortization of net loss	36	67	111	203
Amortization of prior service cost	3	3	8	8
Net Periodic Benefit Cost	$ 13	$ 47	$ 39	$ 141