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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Pension Benefits [Member]
Service cost	$ 61	$ 60	$ 125	$ 121
Interest cost	144	149	289	297
Expected return on plan assets	(225)	(225)	(453)	(451)
Amortization of prior service credit	(6)	(5)	(11)	(10)
Recognized actuarial loss	80	68	158	134
Net periodic benefit cost	54	47	108	91
U.S. Pension Benefits [Member]
Service cost	25	23	52	47
Interest cost	57	58	114	115
Expected return on plan assets	(81)	(80)	(162)	(161)
Amortization of prior service credit	(4)	(4)	(8)	(8)
Recognized actuarial loss	53	39	104	76
Net periodic benefit cost	50	36	100	69
Non-U.S. Pension Benefits [Member]
Service cost	36	37	73	74
Interest cost	87	91	175	182
Expected return on plan assets	(144)	(145)	(291)	(290)
Amortization of prior service credit	(2)	(1)	(3)	(2)
Recognized actuarial loss	27	29	54	58
Net periodic benefit cost	4	11	8	22
Postretirement Benefits [Member]
Service cost			2	2
Interest cost	3	3	6	6
Expected return on plan assets
Amortization of prior service credit		(3)		(6)
Recognized actuarial loss	1		1
Net periodic benefit cost	4		9	2
U.S. Postretirement Benefits [Member]
Service cost			1	1
Interest cost	2	2	4	4
Expected return on plan assets
Amortization of prior service credit		(3)		(6)
Recognized actuarial loss		(1)		(1)
Net periodic benefit cost	2	(2)	5	(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	1	1
Net periodic benefit cost	$ 2	$ 2	$ 4	$ 4