Retirement Plans (Schedule Of Net Periodic Benefit Cost For Pension And Postretirement Benefit Plans) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8,000,000		$ 7,000,000
Interest cost	13,000,000		14,000,000
Expected return on plan assets	(15,000,000)		(13,000,000)
Amortization of prior service cost	1,000,000	[1]	1,000,000	[1]
Net actuarial loss	5,000,000	[1]	4,000,000	[1]
Total net periodic benefit cost	12,000,000	[2]	13,000,000	[2]
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total net periodic benefit cost	$ 0	[2]	$ 0	[2]

[1] These net periodic benefit costs were reclassified out of other comprehensive earnings in the current period.

[2] Net periodic benefit cost is a component of general and administrative expenses on the accompanying consolidated comprehensive statements of earnings.