Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011
Pension Benefits [Member]
Service cost	$ 60	$ 58	$ 121	$ 114
Interest cost	149	153	297	305
Expected return on plan assets	(225)	(224)	(451)	(445)
Amortization of prior service credit	(5)	(4)	(10)	(9)
Recognized actuarial loss	68	53	134	108
Net periodic benefit cost	47	36	91	73
U.S. Pension Benefits [Member]
Service cost	23	21	47	42
Interest cost	58	57	115	115
Expected return on plan assets	(80)	(78)	(161)	(157)
Amortization of prior service credit	(4)	(4)	(8)	(8)
Recognized actuarial loss	39	24	76	50
Net periodic benefit cost	36	20	69	42
Non-U.S. Pension Benefits [Member]
Service cost	37	37	74	72
Interest cost	91	96	182	190
Expected return on plan assets	(145)	(146)	(290)	(288)
Amortization of prior service credit	(1)		(2)	(1)
Recognized actuarial loss	29	29	58	58
Net periodic benefit cost	11	16	22	31
Postretirement Benefits [Member]
Service cost		1	2	3
Interest cost	3	4	6	7
Expected return on plan assets
Amortization of prior service credit	(3)	(4)	(6)	(7)
Recognized actuarial loss
Net periodic benefit cost		1	2	3
U.S. Postretirement Benefits [Member]
Service cost		1	1	2
Interest cost	2	3	4	5
Expected return on plan assets
Amortization of prior service credit	(3)	(4)	(6)	(7)
Recognized actuarial loss	(1)		(1)
Net periodic benefit cost	(2)		(2)
Non-U.S.Postretirement Benefits [Member]
Service cost			1	1
Interest cost	1	1	2	2
Expected return on plan assets
Amortization of prior service credit
Recognized actuarial loss	1		1
Net periodic benefit cost	$ 2	$ 1	$ 4	$ 3