Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Pension Benefits [Member]
Service cost	$ 58	$ 48	$ 114	$ 98
Interest cost	153	141	305	286
Expected return on plan assets	(224)	(200)	(445)	(404)
Amortization of prior service credit	(4)	(5)	(9)	(10)
Recognized actuarial loss	53	37	108	72
Net periodic benefit cost	36	21	73	42
U.S. Pension Benefits [Member]
Service cost	21	19	42	38
Interest cost	57	57	115	113
Expected return on plan assets	(78)	(74)	157	147
Amortization of prior service credit	(4)	(5)	8	9
Recognized actuarial loss	24	19	50	36
Net periodic benefit cost	20	16	42	31
Domestic Pension Plans of Foreign Entity, Defined Benefit [Member]
Service cost	37	29	72	60
Interest cost	96	84	190	173
Expected return on plan assets	(146)	(126)	(288)	(257)
Amortization of prior service credit			(1)	(1)
Recognized actuarial loss	29	18	58	36
Net periodic benefit cost	16	5	31	11
Postretirement Benefits [Member]
Service cost	1	2	3	3
Interest cost	4	4	7	7
Amortization of prior service credit	(4)	(4)	(7)	(7)
Net periodic benefit cost	1	2	3	3
U.S. Postretirement Benefits [Member]
Service cost	1	1	2	2
Interest cost	3	3	5	5
Amortization of prior service credit	(4)	(4)	7	7
Domestic Postretirement Benefit Plans of Foreign Entity, Defined Benefit [Member]
Service cost		1	1	1
Interest cost	1	1	2	2
Net periodic benefit cost	$ 1	$ 2	$ 3	$ 3