Condensed Consolidated Statements of Earnings and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 277.1	$ 260.5	$ 791.2	$ 736.4
Cost of goods sold	165.4	162.6	484.7	485.0
Gross profit	111.7	97.9	306.5	251.4
Selling, general and administrative expenses	41.3	35.3	134.3	113.7
Equity earnings from joint venture	(42.9)	(18.7)	(83.0)	(59.2)
Operating income	113.3	81.3	255.2	196.9
Interest expense	11.7	9.9	31.6	28.9
Other non-operating (income), net	(5.1)	(9.2)	(16.0)	(27.3)
Earnings from continuing operations before income taxes	106.7	80.6	239.6	195.3
Income tax expense	16.0	16.4	48.8	42.3
Earnings from continuing operations	90.7	64.2	190.8	153.0
Net earnings from discontinued operations, net of tax expense (benefit) of $2.5, ($0.5), $7.2 and $1.2	4.8	5.0	3.0	14.4
(Loss) gain from disposal of discontinued businesses, net of tax (benefit) of ($5.0), ($4.6), ($4.9) and ($4.9)	(22.3)	7.0	(27.0)	(16.1)
Net (loss) gain from discontinued operations	(17.5)	12.0	(24.0)	(1.7)
Net earnings	73.2	76.2	166.8	151.3
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	78.6	(7.0)	84.6	(21.9)
Derivative (loss) gain, net	(2.7)	(0.5)	(15.9)	5.3
Pension and postretirement adjustments	5.5	2.7	11.2	7.6
Total other comprehensive income (loss)	81.4	(4.8)	79.9	(9.0)
Total comprehensive income	$ 154.6	$ 71.4	$ 246.7	$ 142.3
Earnings per share of common stock, continuing operations:
Basic	$ 1.86	$ 1.26	$ 3.90	$ 2.94
Diluted	1.83	1.23	3.84	2.89
(Loss) earnings per share of common stock, discontinued operations:
Basic	(0.36)	0.24	(0.49)	(0.03)
Diluted	(0.35)	0.23	(0.48)	(0.03)
Net earnings per share of common stock:
Basic	1.50	1.50	3.41	2.91
Diluted	$ 1.48	$ 1.46	$ 3.36	$ 2.86
Average number of common shares outstanding:
Basic	48.7	50.7	48.8	51.9
Diluted	49.5	51.9	49.6	52.8