Retirement Benefits (Schedule Of Defined Benefit Plan Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 61	$ 64
Interest cost	161	145
Expected return on plan assets	(248)	(228)
Amortization of prior service credit	(3)	(5)
Recognized actuarial loss	51	78
Net periodic benefit cost	22	54
Curtailment (credit)	(65)	0
Total cost (credit)	(43)	54
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	22	27
Interest cost	63	57
Expected return on plan assets	(86)	(81)
Amortization of prior service credit	(2)	(4)
Recognized actuarial loss	26	51
Total cost (credit)	23	50
Non-U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	39	37
Interest cost	98	88
Expected return on plan assets	(162)	(147)
Amortization of prior service credit	(1)	(1)
Recognized actuarial loss	25	27
Net periodic benefit cost	(1)	4
Curtailment (credit)	(65)	0
Total cost (credit)	(66)	4
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2
Interest cost	3	3
Expected return on plan assets
Amortization of prior service credit
Recognized actuarial loss
Net periodic benefit cost	4	5
Curtailment (credit)	0	0
Total cost (credit)	4	5
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1
Interest cost	2	2
Expected return on plan assets
Amortization of prior service credit
Recognized actuarial loss
Total cost (credit)	2	3
Foreign Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	1	1
Expected return on plan assets
Amortization of prior service credit
Recognized actuarial loss
Net periodic benefit cost	2	2
Total cost (credit)	$ 2	$ 2