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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 63	$ 59	$ 188	$ 180
Interest cost	144	148	433	445
Expected return on plan assets	(227)	(225)	(680)	(676)
Amortization of prior service credit	(5)	(4)	(16)	(14)
Recognized actuarial loss	79	67	237	201
Net periodic benefit cost	54	45	162	136
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	26	23	78	70
Interest cost	57	57	171	172
Expected return on plan assets	(81)	(80)	(243)	(241)
Amortization of prior service credit	(4)	(4)	(12)	(12)
Recognized actuarial loss	52	38	156	114
Net periodic benefit cost	50	34	150	103
Non-U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	37	36	110	110
Interest cost	87	91	262	273
Expected return on plan assets	(146)	(145)	(437)	(435)
Amortization of prior service credit	(1)		(4)	(2)
Recognized actuarial loss	27	29	81	87
Net periodic benefit cost	4	11	12	33
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1	4	3
Interest cost	2	3	8	9
Expected return on plan assets
Amortization of prior service credit		(3)		(9)
Recognized actuarial loss			1
Net periodic benefit cost	4	1	13	3
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2	2
Interest cost	1	2	5	6
Expected return on plan assets
Amortization of prior service credit		(3)		(9)
Recognized actuarial loss				(1)
Net periodic benefit cost	2		7	(2)
Foreign Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1		2	1
Interest cost	1	1	3	3
Expected return on plan assets
Amortization of prior service credit
Recognized actuarial loss			1	1
Net periodic benefit cost	$ 2	$ 1	$ 6	$ 5