Pension Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
U.S. [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	$ 4	$ 1	$ 11	$ 5
Interest cost	11	8	35	24
Expected return on plan assets	(13)	(8)	(41)	(24)
Amortization of prior service cost	1	1	4	3
Amortization of net loss	6	3	18	10
Loss on curtailment	0	0	0	0
Total pension cost	9	5	27	18
Defined Benefit Pension Contributions Disclosure [Abstract]
Defined Benefit Plan Contributions By Employer			39
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Fiscal Year	10		10
Foreign [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	4	5	14	15
Interest cost	124	144	391	434
Expected return on plan assets	(107)	(130)	(340)	(391)
Amortization of prior service cost	0	0	0	0
Amortization of net loss	9	6	30	18
Loss on curtailment	0	0	0	4
Total pension cost	30	25	95	80
Defined Benefit Pension Contributions Disclosure [Abstract]
Defined Benefit Plan Contributions By Employer			122
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Fiscal Year	$ 47		$ 47