Segment Information - Total Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Assets
Total assets:	$ 9,999	$ 9,135	$ 9,497
Reportable Segment Totals
Assets
Total assets:	9,784	8,777	9,162
Europe
Assets
Total assets:	3,140	2,792	2,972
North America
Assets
Total assets:	2,826	2,522	2,536
Latin America
Assets
Total assets:	2,772	2,537	2,629
Asia Pacific
Assets
Total assets:	1,046	926	1,025
Other
Assets
Total assets:	$ 215	$ 358	$ 335