CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
NET SALES
Related parties	$ 235.8	$ 282.3	$ 792.4	$ 898.7
Other customers	157.1	155.7	423.6	502.5
Total net sales	392.9	438.0	1,216.0	1,401.2
Cost of goods sold	420.0	451.7	1,251.3	1,431.8
Gross profit (loss)	(27.1)	(13.7)	(35.3)	(30.6)
Selling, general and administrative expenses	11.0	11.6	31.7	38.2
Other operating (income) expense - net	(0.2)	(0.1)	0.3	0.4
Operating income (loss)	(37.9)	(25.2)	(67.3)	(69.2)
Interest expense - Hawesville term loan	(0.4)	(0.8)	(1.6)	(1.3)
Interest expense	(9.1)	(5.6)	(21.0)	(17.3)
Interest income	0.1	0.2	0.6	0.6
Net gain (loss) on forward and derivative contracts	(9.4)	10.3	(1.9)	10.7
Loss on early extinguishment of debt	(1.2)	0.0	(1.2)	0.0
Other income (expense) - net	0.0	(0.9)	3.0	(1.6)
Income (loss) before income taxes and equity in earnings of joint ventures	(57.9)	(22.0)	(89.4)	(78.1)
Income tax benefit (expense)	(0.3)	1.3	1.6	5.7
Income (loss) before equity in earnings of joint ventures	(58.2)	(20.7)	(87.8)	(72.4)
Loss on sale of BHH	0.0	0.0	0.0	(4.3)
Equity in earnings of joint ventures	0.0	0.0	0.0	0.7
Net income (loss)	$ (58.2)	$ (20.7)	$ (87.8)	$ (76.0)
EARNINGS (LOSS) PER COMMON SHARE:
Basic and diluted (USD per share)	$ (0.65)	$ (0.23)	$ (0.98)	$ (0.86)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic and diluted (per share)	89.5	88.9	89.4	88.6