Segment and Geographic Information (Geographic Information for Sales to External Customers and Long-lived Assets) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,995	$ 2,255	$ 2,235	$ 2,150	$ 2,010	$ 2,109	$ 1,979	$ 1,943	$ 8,635	$ 8,041	$ 5,076
Long-lived assets	6,595				6,412				6,595	6,412
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									6,114	5,739	3,526
Long-lived assets	5,829				5,668				5,829	5,668
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									649	653	317
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									500	432	402
Long-lived assets	528				504				528	504
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									155	104	87
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									105	96	84
TAIWAN, PROVINCE OF CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									102	96	25
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,010	921	$ 635
Long-lived assets	$ 238				$ 240				$ 238	$ 240