Unaudited Quarterly Financial Information - Summary of Unaudited Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 799	$ 784	$ 877	$ 915	$ 804	$ 745	$ 775	$ 772	$ 3,375	$ 3,096	$ 2,997
Gross Profit	172	178	215	211	173	177	197	188	776	735	632
Net income (loss)	$ 43	$ 929	$ 150	$ 58	$ (1,220)	$ 57	$ 105	$ 75	$ 1,180	$ (983)	$ 199
EPS – Basic	$ 0.58	$ 12.54	$ 2.03	$ 0.78	$ (16.47)	$ 0.77	$ 1.42	$ 1.01	$ 15.93	$ (13.27)	$ 2.69
EPS – Diluted	$ 0.57	$ 12.54	$ 2.03	$ 0.78	$ (16.47)	$ 0.77	$ 1.42	$ 1.01	$ 15.86	$ (13.27)	$ 2.69