Segment and Geographic Reporting Geographic Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales/Other revenue from operations	$ 6,815	$ 9,722	$ 10,576
Other revenues from operations	608	666	647
Property, plant and equipment, net	4,228	4,454
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales/Other revenue from operations	6,462	9,271	10,170
Other revenues from operations	604	652	629
Property, plant and equipment, net	4,082	4,299
Other geographical locations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales/Other revenue from operations	353	451	406
Other revenues from operations	4	14	$ 18
Property, plant and equipment, net	$ 146	$ 155