Business Segments - Geographic Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 14,745	$ 15,475	$ 15,377
Long-Lived Assets	7,208	7,259
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	6,489	6,692	6,678
Long-Lived Assets	2,681	2,734
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	722	762
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	979	1,691	1,874
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	7,277	7,092	$ 6,825
Long-Lived Assets	$ 3,805	$ 3,763