Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net sales	$ 596.4	$ 464.9	$ 1,683.4	$ 1,429.6
Operating costs and expenses:
Cost of sales	442.6	416.2	1,301.2	1,287.4
Depreciation and amortization	29.6	25.9	86.0	77.9
Selling and administrative	47.0	38.3	135.8	114.9
Loss on sale or impairment of long-lived assets, net	0.3	0.9	1.0	1.5
Other operating credits and charges, net	0.0	1.0	11.4	12.6
Total operating costs and expenses	519.5	482.3	1,535.4	1,494.3
Income (loss) from operations	76.9	(17.4)	148.0	(64.7)
Non-operating income (expense):
Interest expense, net of capitalized interest	(9.0)	(8.4)	(26.3)	(23.1)
Investment income	2.5	0.5	6.4	2.9
Loss on early debt extinguishment	(13.2)	0.0	(13.2)	0.0
Other non-operating items	(0.5)	(3.7)	1.4	(5.5)
Total non-operating income (expense)	(20.2)	(11.6)	(31.7)	(25.7)
Income (loss) from continuing operations before taxes and equity in income of unconsolidated affiliates	56.7	(29.0)	116.3	(90.4)
Provision (benefit) for income taxes	(7.5)	(2.4)	13.1	(7.7)
Equity in income of unconsolidated affiliates	(1.4)	(2.0)	(4.4)	(4.1)
Income (loss) from continuing operations	65.6	(24.6)	107.6	(78.6)
Loss from discontinued operations before taxes	0.0	(2.9)	0.0	(2.9)
Benefit for income taxes	0.0	(1.0)	0.0	(1.0)
Loss from discontinued operations	0.0	(1.9)	0.0	(1.9)
Net Income (loss)	$ 65.6	$ (26.5)	$ 107.6	$ (80.5)
Net income (loss) per share of common stock (basic):
Income (loss) from continuing operations	$ 0.46	$ (0.17)	$ 0.75	$ (0.55)
Loss from discontinued operations	0.00	(0.02)	0.00	(0.02)
Net income (loss) per share - basic	0.46	(0.19)	0.75	(0.57)
Net income (loss) per share of common stock (diluted):
Income (loss) from continuing operations	0.45	(0.17)	0.74	(0.55)
Loss from discontinued operations	0.00	(0.02)	0.00	(0.02)
Net income (loss) per share - diluted	$ 0.45	$ (0.19)	$ 0.74	$ (0.57)
Average shares of stock outstanding - basic	143.7	142.6	143.3	142.3
Average shares of stock outstanding - diluted	145.4	142.6	145.2	142.3