Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 46	$ 50		$ 90	$ 102
Interest cost	138	146		275	292
Expected return on plan assets	(242)	(243)		(483)	(486)
Amortization of prior service (credit) cost	(1)	0		(1)	0
Recognized actuarial loss (gain)	42	78		84	154
Net periodic benefit (credit) cost	(17)	31		(35)	62
Curtailment gain	(5)	0		(5)	0
Settlement loss	1	0		1	0
Plan termination				0	0
Total (credit) cost	(21)	31		(39)	62
U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	27	29		53	59
Interest cost	66	63		132	125
Expected return on plan assets	(95)	(92)		(190)	(184)
Amortization of prior service (credit) cost	0	0		0	0
Recognized actuarial loss (gain)	18	46		36	91
Net periodic benefit (credit) cost	16	46		31	91
Plan termination	0	0		0	0
Total (credit) cost	16	46		31	91
Non-U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	19	21		37	43
Interest cost	72	83		143	167
Expected return on plan assets	(147)	(151)		(293)	(302)
Amortization of prior service (credit) cost	(1)	0		(1)	0
Recognized actuarial loss (gain)	24	32		48	63
Net periodic benefit (credit) cost	(33)	(15)		(66)	(29)
Curtailment gain	(5)	0		(5)	0
Settlement loss	1	0		1	0
Total (credit) cost	(37)	(15)		(70)	(29)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1		0	2
Interest cost	1	2		3	4
Expected return on plan assets	0	0		0	0
Amortization of prior service (credit) cost	1	1		2	1
Recognized actuarial loss (gain)	0	(1)		(1)	(1)
Net periodic benefit (credit) cost	2	3		4	6
Curtailment gain	0	0		0	0
Settlement loss	0	0		0	0
Plan termination				0	(128)
Total (credit) cost	2	3	$ (125)	4	(122)
U.S. Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0		0	1
Interest cost	0	1		1	2
Expected return on plan assets	0	0		0	0
Amortization of prior service (credit) cost	1	1		2	1
Recognized actuarial loss (gain)	0	(1)		(1)	(1)
Net periodic benefit (credit) cost	1	1		2	3
Plan termination	0	0		0	(128)
Total (credit) cost	1	1		2	(125)
Foreign Postretirement Benefit Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1		0	1
Interest cost	1	1		2	2
Expected return on plan assets	0	0		0	0
Amortization of prior service (credit) cost	0	0		0	0
Recognized actuarial loss (gain)	0	0		0	0
Net periodic benefit (credit) cost	1	2		2	3
Curtailment gain	0	0		0	0
Settlement loss	0	0		0	0
Total (credit) cost	$ 1	$ 2		$ 2	$ 3