CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
NET SALES
Related parties	$ 305.3	$ 299.2	$ 884.2	$ 876.1
Other customers	176.5	101.4	522.1	279.1
Total net sales	481.8	400.6	1,406.3	1,155.2
Cost of goods sold	493.6	359.2	1,369.9	1,074.5
Gross profit (loss)	(11.8)	41.4	36.4	80.7
Selling, general and administrative expenses	8.8	14.0	31.5	34.0
Ravenswood (gains)	0.0	(5.5)	0.0	(5.5)
Helguvik (gains)	(4.5)	0.0	(4.5)	0.0
Other operating (income) expense - net	(0.5)	0.4	0.0	1.6
Operating income (loss)	(15.6)	32.5	9.4	50.6
Interest expense	(5.6)	(5.5)	(16.7)	(16.6)
Interest income	0.4	0.4	1.3	0.9
Net gain (loss) on forward and derivative contracts	0.8	(3.9)	2.8	(17.1)
Other income (expense) - net	0.7	0.4	1.8	(1.0)
Income (loss) before income taxes and equity in earnings of joint ventures	(19.3)	23.9	(1.4)	16.8
Income tax (expense)	(1.7)	(3.3)	(3.0)	(4.5)
Income (loss) before equity in earnings of joint ventures	(21.0)	20.6	(4.4)	12.3
Equity in earnings of joint ventures	0.7	0.2	3.2	0.5
Net income (loss)	(20.3)	20.8	(1.2)	12.8
Net income (loss) allocated to common stockholders	$ (20.3)	$ 19.1	$ (1.2)	$ 11.8
EARNINGS (LOSS) PER COMMON SHARE:
Earnings per share, basic (shares)	$ (0.23)	$ 0.22	$ (0.01)	$ 0.13
Earnings per share, diluted (shares)	$ (0.23)	$ 0.22	$ (0.01)	$ 0.13
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (shares)	87.6	87.3	87.6	87.3
Diluted (shares)	87.6	88.3	87.6	88.1