Retirement Benefits Plans - Change in Benefit Obligations (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Change in benefit obligations
Actuarial loss	$ (229)	[1]
United States pension liabilities [Member]
Change in benefit obligations
Balance at January 1	3,817		2,899
Service cost	128		115
Interest cost	147		134
Actuarial loss	(223)		264
Gross benefits paid	(246)		(132)
Currency translation	0		0
Acquistions	0		536
Other	2		1
Balance at December 31	3,625		3,817
Accumulated benefit obligation	3,458		3,639
Non-United States pension liabilities [Member]
Change in benefit obligations
Balance at January 1	2,017		1,505
Service cost	62		50
Interest cost	80		77
Actuarial loss	21		196
Gross benefits paid	(90)		(78)
Currency translation	36		54
Acquistions	0		212
Other	1		1
Balance at December 31	2,127		2,017
Accumulated benefit obligation	2,003		1,885
Other postretirement liabilities [Member]
Change in benefit obligations
Balance at January 1	950		853
Service cost	20		17
Interest cost	35		38
Actuarial loss	(54)		34
Gross benefits paid	(103)		(94)
Currency translation	(2)		0
Acquistions	0		74
Other	21		28
Balance at December 31	$ 867		$ 950

[1] These components of Accumulated other comprehensive loss are included in the computation of net periodic pension cost. See Note 6 for additional information about defined benefit pension items.