Consolidated Statements of Earnings and Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 893.6	$ 837.3	$ 805.1
Cost of goods sold	569.8	531.5	499.1
Gross profit	323.8	305.8	306.0
Selling, general and administrative expenses	135.7	155.5	180.8
Separation costs		34.5	34.3
Equity earnings from joint venture	(67.0)	(73.1)	(66.1)
Operating income	255.1	188.9	157.0
Interest expense	35.4	49.5	44.6
Other non-operating (income) expense, net	(2.4)	(11.2)	17.8
Earnings from continuing operations before income taxes	222.1	150.6	94.6
Income tax expense	1.5	51.3	36.7
Earnings from continuing operations	220.6	99.3	57.9
Net gain (loss) from discontinued operations, net of tax expense (benefit) of $3.6, ($0.8) and $34.6	4.2	(9.9)	(5.3)
(Loss) gain on disposal of discontinued business, net of tax (benefit) of ($4.1), ($15.2) and ($41.8)	(70.0)	15.3	41.6
Net (loss) gain from discontinued operations	(65.8)	5.4	36.3
Net earnings	154.8	104.7	94.2
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	24.5	(33.2)	(25.5)
Derivative (loss) gain	(0.3)	7.5	0.7
Pension and postretirement adjustments	33.7	49.3	32.9
Total other comprehensive income	57.9	23.6	8.1
Total comprehensive income	$ 212.7	$ 128.3	$ 102.3
Earnings per share of common stock, continuing operations:
Basic	$ 4.12	$ 1.79	$ 1.04
Diluted	4.08	1.78	1.03
(Loss) earnings per share of common stock, discontinued operations:
Basic	(1.23)	0.09	0.65
Diluted	(1.22)	0.09	0.65
Net earnings per share of common stock:
Basic	2.89	1.88	1.69
Diluted	$ 2.86	$ 1.87	$ 1.68
Average number of common shares outstanding:
Basic	53.3	55.4	55.5
Diluted	53.9	55.7	55.9