Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Assets
Total assets:	$ 8,871	$ 8,975	$ 9,601
Reportable Segment Totals
Assets
Total assets:	8,597	8,669	9,318
Europe
Assets
Total assets:	3,510	3,588	3,693
North America
Assets
Total assets:	2,058	2,020	2,002
South America
Assets
Total assets:	1,658	1,682	1,649
Asia Pacific
Assets
Total assets:	1,371	1,379	1,974
Other
Assets
Total assets:	$ 274	$ 306	$ 283