Pension Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
U.S. [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	$ 4	$ 2
Interest cost	12	8
Expected return on plan assets	(14)	(8)
Amortization of prior service cost	1	1
Amortization of net loss	6	3
Loss on curtailment	0	0
Total pension cost	9	6
Defined Benefit Pension Contributions Disclosure [Abstract]
Defined Benefit Plan Contributions By Employer	7
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Fiscal Year	41
Foreign [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	7	5
Interest cost	141	142
Expected return on plan assets	(122)	(128)
Amortization of prior service cost	0	0
Amortization of net loss	10	6
Loss on curtailment	0	4
Total pension cost	36	29
Defined Benefit Pension Contributions Disclosure [Abstract]
Defined Benefit Plan Contributions By Employer	41
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Fiscal Year	$ 139