Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net sales	$ 493.0	$ 518.5	$ 964.7	$ 963.2
Operating costs and expenses:
Cost of sales	443.4	461.5	871.2	849.9
Depreciation and amortization	25.3	24.9	52.0	50.5
Selling and administrative	37.9	35.9	76.6	76.8
(Gain) loss on sale or impairment of long-lived assets, net	0.5	(0.5)	0.6	(0.5)
Other operating charges and credits, net	0.0	0.6	11.6	0.6
Total operating costs and expenses	507.1	522.4	1,012.0	977.3
Loss from operations	(14.1)	(3.9)	(47.3)	(14.1)
Non-operating income (expense):
Interest expense, net of capitalized interest	(7.2)	(7.4)	(14.7)	(15.1)
Interest income	1.0	1.7	2.4	3.5
Other non-operating items	0.4	3.8	(1.8)	(0.5)
Total non-operating income (expense)	(5.8)	(1.9)	(14.1)	(12.1)
Loss from operations before taxes and equity in income of unconsolidated affiliates	(19.9)	(5.8)	(61.4)	(26.2)
Provision (benefit) for income taxes	1.0	(6.7)	(5.3)	(12.3)
IncomeLossFromEquityMethodInvestments	1.4	1.2	2.1	1.8
Net Income (loss)	$ (19.5)	$ 2.1	$ (54.0)	$ (12.1)
Loss per share of common stock (basic and diluted):
Net income (loss) per share - basic	$ (0.14)	$ 0.01	$ (0.38)	$ (0.09)
Net income (loss) per share - diluted	$ (0.14)	$ 0.01	$ (0.38)	$ (0.09)
Net income (loss) per share of common stock (diluted):
Average shares of stock outstanding - basic	142.3	140.8	142.1	140.8
Average shares of stock outstanding - diluted	142.3	144.0	142.1	140.8