Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 1,892.5	$ 1,934.8	$ 2,085.2
Operating costs and expenses:
Cost of sales	1,682.7	1,757.8	1,636.9
Depreciation and amortization	101.9	100.7	91.3
Selling and administrative	152.8	149.5	150.2
Loss on sale or impairment of long lived assets	2.1	(3.1)	0.2
Other operating credits and charges, net	16.3	7.5	3.8
Total operating costs and expenses	1,955.8	2,012.4	1,882.4
Income (loss) from operations	(63.3)	(77.6)	202.8
Non-operating income (expense):
Interest expense, net of capitalized interest	(31.2)	(29.8)	(36.0)
Investment income	4.4	5.5	10.3
Other Nonoperating Income (Expense)	(5.3)	(3.1)	29.5
Total non-operating income (expense)	(32.1)	(27.4)	3.8
Income (loss) before income taxes and equity in (income) loss of unconsolidated affiliates	(95.4)	(105.0)	206.6
Provision (benefit) for income taxes	(2.7)	(27.2)	41.1
Equity in (income) loss of unconsolidated affiliates	(6.7)	(4.4)	(11.9)
Income (loss) from continuing operations	(86.0)	(73.4)	177.4
Loss from discontinued operations before taxes	(3.2)	(3.0)	(0.4)
Benefit for income taxes	(1.1)	(1.0)	(0.1)
Loss from discontinued operations	(2.1)	(2.0)	(0.3)
Net income (loss)	$ (88.1)	$ (75.4)	$ 177.1
Basic net income (loss) per share:
Income (loss) per share from continuing operations	$ (0.60)	$ (0.52)	$ 1.27
Loss per share from discontinued operations	(0.02)	(0.01)	0.00
Net income (loss) per share	(0.62)	(0.53)	1.27
Diluted net earnings (loss) per share:
Income (loss) per share from continuing operations	(0.60)	(0.52)	1.23
Loss per share from discontinued operations	(0.02)	(0.01)	0.00
Net income (loss) per share	$ (0.62)	$ (0.53)	$ 1.23
Weighted average number of shares outstanding - basic	142.4	141.1	139.6
Weighted Average Number of Shares Outstanding, Diluted	142.4	141.1	144.3