Pension and Other Postretirement Benefits (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension
Change in benefit obligation:
Benefit obligation at January 1	$ 2,655	$ 2,465
Service cost	87	100	94
Interest cost	100	107	116
Plan participants’ contributions	5	6
Amendments	0	5
Actuarial (gain) loss	(68)	204
Acquisitions/divestitures	(12)	(74)
Benefits paid	(247)	(196)
Medicare subsidy received	0	0
Liabilities from (to) other immaterial plans	10	0
Settlement/curtailment (gain) loss	(1)	5
Foreign currency translation	16	33
Benefit obligation at December 31	2,545	2,655	2,465
Other Postretirement Benefits
Change in benefit obligation:
Benefit obligation at January 1	589	569
Service cost	12	13	14
Interest cost	24	27	30
Plan participants’ contributions	15	15
Amendments	0	0
Actuarial (gain) loss	(77)	45
Acquisitions/divestitures	0	0
Benefits paid	(47)	(45)
Medicare subsidy received	3	3
Liabilities from (to) other immaterial plans	0	0
Settlement/curtailment (gain) loss	0	(38)
Foreign currency translation	0	0
Benefit obligation at December 31	$ 519	$ 589	$ 569