Condensed Consolidated Statements of Earnings and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 242.1	$ 227.3
Cost of goods sold	150.7	156.5
Gross profit	91.4	70.8
Selling, general and administrative expenses	55.6	37.5
Equity earnings from joint venture	(18.9)	(16.3)
Operating income	54.7	49.6
Interest expense	10.4	9.2
Other non-operating (income), net	(5.5)	(9.0)
Earnings from continuing operations before income taxes	49.8	49.4
Income tax expense	13.4	8.2
Earnings from continuing operations	36.4	41.2
Net earnings from discontinued operations, net of tax (benefit) expense of ($0.1) and $1.5	0.5	3.9
Gain (loss) from disposal of discontinued businesses, net of tax (benefit) of $- and ($0.4)	2.2	(17.3)
Net gain (loss) from discontinued operations	2.7	(13.4)
Net earnings	39.1	27.8
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	5.3	5.9
Derivative (loss) gain, net	(5.1)	3.8
Pension and postretirement adjustments	2.8	1.8
Total other comprehensive income	3.0	11.5
Total comprehensive income	$ 42.1	$ 39.3
Earnings per share of common stock, continuing operations:
Basic	$ 0.75	$ 0.78
Diluted	0.73	0.76
Earnings (loss) per share of common stock, discontinued operations:
Basic	0.05	(0.25)
Diluted	0.05	(0.25)
Net earnings per share of common stock:
Basic	0.80	0.53
Diluted	$ 0.78	$ 0.51
Average number of common shares outstanding:
Basic	48.7	53.0
Diluted	49.5	53.8