Benefit Plans (Schedule Of Components Of Net Periodic Pension Cost) (Details) (Pension Plan [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 21	$ 17
Interest cost	84	86
Expected return on plan assets	(135)	(130)
Amortization of net loss	59	38
Amortization of prior service cost	2	3
Net Periodic Benefit Cost	$ 31	$ 14