Condensed Consolidated Statements Of Operations And Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Condensed Consolidated Statements Of Operations And Comprehensive Income [Abstract]
Net sales	$ 571.8	$ 551.4
Cost of goods sold	440.3	421.9
Gross profit	131.5	129.5
Selling, general and administrative expenses	104.2	103.0
Separation costs	27.1	4.3
Equity earnings from joint venture	(18.1)	(13.6)
Operating income (loss)	18.3	35.8
Interest expense	21.9	11.2
Other non-operating expense	0.3	1.3
Other non-operating (income)	(4.4)	(0.6)
Earnings from continuing operations before income taxes	0.5	23.9
Income tax expense	12.1	20.1
(Loss) earnings from continuing operations	(11.6)	3.8
Gain from disposal of discontinued business, net of tax benefit of ($1.8) and ($43.4)	1.7	42.8
Net (loss) earnings	(9.9)	46.6
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1.4	(15.3)
Derivative gain (loss)	1.6	(0.5)
Pension and postretirement adjustments	7.8	11.9
Total other comprehensive income (loss)	10.8	(3.9)
Total comprehensive income	$ 0.9	$ 42.7
(Loss) earnings per share of common stock, continuing operations:
Basic	$ (0.21)	$ 0.07
Diluted	(0.21)	0.07
Earnings per share of common stock, discontinued operations:
Basic	0.03	0.77
Diluted	0.03	0.76
Net (loss) earnings per share of common stock:
Basic	(0.18)	0.84
Diluted	$ (0.18)	$ 0.83
Average number of common shares outstanding:
Basic	55.6	55.3
Diluted	55.6	55.7