Business Segments - Geographic Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 15,158	$ 16,443	$ 18,138
Long-Lived Assets	7,040	6,777	7,153
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	6,724	7,338	7,558
Long-Lived Assets	2,651	2,468	2,464
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	716	766	809
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	1,853	1,905	2,288
Long-Lived Assets	717	778	833
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	6,581	7,200	8,292
Long-Lived Assets	$ 2,956	$ 2,765	$ 3,047