Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 315.4	$ 287.4
Cost of goods sold	216.1	203.1
Gross profit	99.3	84.3
Selling, general and administrative expenses	54.6	53.7
Separation costs		27.1
Equity earnings from joint venture	(18.3)	(18.1)
Operating income	63.0	21.6
Interest expense	9.2	21.9
Other non-operating expense	1.8
Other non-operating (income)	(3.4)	(5.2)
Earnings from continuing operations before income taxes	55.4	4.9
Income tax expense	24.6	12.0
Earnings (loss) from continuing operations	30.8	(7.1)
Net (loss) from discontinued operations, net of tax expense of $ -, and $ 0.1		(4.5)
(Loss) gain from disposal of discontinued business, net of tax expense (benefit) of $0.3 and ($1.8)	(0.4)	1.7
Net (loss) from discontinued operations	(0.4)	(2.8)
Net earnings (loss)	30.4	(9.9)
Other comprehensive income, net of tax:
Foreign currency translation adjustments	11.1	1.4
Derivative gain	0.1	1.6
Pension and postretirement adjustments	2.5	7.8
Total other comprehensive income	13.7	10.8
Total comprehensive income	$ 44.1	$ 0.9
Earnings (loss) per share of common stock, continuing operations:
Basic	$ 0.57	$ (0.13)
Diluted	0.56	(0.13)
(Loss) per share of common stock, discontinued operations:
Basic	(0.01)	(0.05)
Diluted	(0.01)	(0.05)
Net earnings (loss) per share of common stock:
Basic	0.56	(0.18)
Diluted	$ 0.56	$ (0.18)
Average number of common shares outstanding:
Basic	54.1	55.6
Diluted	54.5	55.6