Pension Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
U.S. [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	$ 3	$ 2	$ 7	$ 4
Interest cost	12	8	24	16
Expected return on plan assets	(14)	(8)	(28)	(16)
Amortization of prior service cost	2	1	3	2
Amortization of net loss	6	4	12	7
Loss on curtailment	0	0	0	0
Total pension cost	9	7	18	13
Defined Benefit Pension Contributions Disclosure [Abstract]
Defined Benefit Plan Contributions By Employer			17
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Fiscal Year	31		31
Foreign [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	3	5	10	10
Interest cost	126	148	267	290
Expected return on plan assets	(111)	(133)	(233)	(261)
Amortization of prior service cost	0	0	0	0
Amortization of net loss	11	6	21	12
Loss on curtailment	0	0	0	4
Total pension cost	29	26	65	55
Defined Benefit Pension Contributions Disclosure [Abstract]
Defined Benefit Plan Contributions By Employer			83
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Fiscal Year	$ 85		$ 85