Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 49		$ 63	$ 172	$ 188
Interest cost	163		144	485	433
Expected return on plan assets	(251)		(227)	(749)	(680)
Amortization of prior service credit	(2)		(5)	(8)	(16)
Recognized actuarial loss	55		79	159	237
Net periodic benefit cost				59	162
Curtailment (credit)				(65)	0
Total cost (credit)	14		54	(6)	162
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	23		26	68	78
Interest cost	65		57	190	171
Expected return on plan assets	(87)		(81)	(260)	(243)
Amortization of prior service credit	(1)		(4)	(5)	(12)
Recognized actuarial loss	31		52	84	156
Total cost (credit)	31		50	77	150
Non-U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	26		37	104	110
Interest cost	98		87	295	262
Expected return on plan assets	(164)		(146)	(489)	(437)
Amortization of prior service credit	(1)		(1)	(3)	(4)
Recognized actuarial loss	24		27	75	81
Net periodic benefit cost				(18)	12
Curtailment (credit)		(65)		(65)	0
Total cost (credit)	(17)		4	(83)	12
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2		2	4	4
Interest cost	3		2	9	8
Expected return on plan assets	0		0	0	0
Amortization of prior service credit	0		0	0	0
Recognized actuarial loss	(1)		0	(1)	1
Net periodic benefit cost				12	13
Curtailment (credit)				0	0
Total cost (credit)	4		4	12	13
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1		1	2	2
Interest cost	2		1	6	5
Expected return on plan assets	0		0	0	0
Amortization of prior service credit	0		0	0	0
Recognized actuarial loss	(1)		0	(2)	0
Total cost (credit)	2		2	6	7
Foreign Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1		1	2	2
Interest cost	1		1	3	3
Expected return on plan assets	0		0	0	0
Amortization of prior service credit	0		0	0	0
Recognized actuarial loss	0		0	1	1
Net periodic benefit cost				6	6
Curtailment (credit)				0	0
Total cost (credit)	$ 2		$ 2	$ 6	$ 6