Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales	$ 582.4	$ 493.0	$ 1,087.0	$ 964.7
Operating costs and expenses:
Cost of sales	443.1	443.4	858.6	871.2
Depreciation and amortization	28.5	25.3	56.4	52.0
Selling and administrative	46.5	37.9	88.8	76.6
Loss on sale or impairment of long-lived assets, net	0.7	0.5	0.7	0.6
Other operating credits and charges, net	11.4	0.0	11.4	11.6
Total operating costs and expenses	530.2	507.1	1,015.9	1,012.0
Income (loss) from operations	52.2	(14.1)	71.1	(47.3)
Non-operating income (expense):
Interest expense, net of capitalized interest	(9.3)	(7.2)	(17.3)	(14.7)
Interest income	2.1	1.0	3.9	2.4
Other non-operating items	1.4	0.4	1.9	(1.8)
Total non-operating income (expense)	(5.8)	(5.8)	(11.5)	(14.1)
Income (loss) before taxes and equity in income of unconsolidated affiliates	46.4	(19.9)	59.6	(61.4)
Provision (benefit) for income taxes	16.2	1.0	20.6	(5.3)
Equity in income of unconsolidated affiliates	(1.5)	(1.4)	(3.0)	(2.1)
Net Income (loss)	$ 31.7	$ (19.5)	$ 42.0	$ (54.0)
Income (loss) per share of common stock (basic and diluted):
Net income (loss) per share - basic	$ 0.22	$ (0.14)	$ 0.29	$ (0.38)
Net income (loss) per share - diluted	$ 0.22	$ (0.14)	$ 0.29	$ (0.38)
Weighted average number of shares outstanding - basic	143.4	142.3	143.1	142.1
Weighted average number of shares outstanding - diluted	145.2	142.3	145.1	142.1