CONSOLIDATED AND COMBINED INTERIM STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales (Note 4)	$ 781	$ 784	$ 2,418	$ 2,576
Cost of goods sold	609	606	1,868	1,972
Gross profit	172	178	550	604
Selling, general and administrative expenses	68	60	186	186
Other expense, net (Note 6)	18	51	54	132
Interest expense	18	1	52	3
Non-operating expense (income)	(4)	(7)	2	(10)
Income before taxes	72	73	256	293
Tax expense (benefit) (Note 7)	34	(856)	79	(844)
Net income	$ 38	$ 929	$ 177	$ 1,137
Earnings per common share (Note 16)
Basic	$ 0.51	$ 12.54	$ 2.37	$ 15.35
Diluted	$ 0.50	$ 12.54	$ 2.34	$ 15.35
Weighted average common shares outstanding (Note 16)
Basic	74,753,593	74,070,852	74,528,740	74,070,852
Diluted	75,704,457	74,070,852	75,700,652	74,070,852