Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Assets
Total assets:	$ 8,472	$ 8,598	$ 8,871
Reportable Segment Totals
Assets
Total assets:	8,249	8,360	8,597
Europe
Assets
Total assets:	3,515	3,362	3,510
North America
Assets
Total assets:	2,007	1,994	2,058
South America
Assets
Total assets:	1,499	1,655	1,658
Asia Pacific
Assets
Total assets:	1,228	1,349	1,371
Other
Assets
Total assets:	$ 223	$ 238	$ 274