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, 2014	Mar. 31, 2013
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 17	$ 21
Interest cost	86	78
Expected return on plan assets	(130)	(123)
Amortization of net loss	38	69
Amortization of prior service cost	3	3
Net Periodic Benefit Cost	$ 14	$ 48