Benefit Plans (Schedule Of Components Of Net Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 22	$ 17	$ 43	$ 34
Interest cost	84	86	168	172
Expected return on plan assets	(135)	(130)	(270)	(260)
Amortization of net loss	58	37	117	75
Amortization of prior service cost	2	2	4	5
Net Periodic Benefit Cost	$ 31	$ 12	$ 62	$ 26