Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 246.3	$ 277.1	$ 698.2	$ 791.2
Cost of goods sold	155.1	165.4	447.9	484.7
Gross profit	91.2	111.7	250.3	306.5
Selling, general and administrative expenses	41.0	41.3	108.8	134.3
Gain related to sale of fixed and intangible assets	(6.9)		(21.0)
Equity earnings from joint venture	(15.2)	(42.9)	(48.2)	(83.0)
Operating income	72.3	113.3	210.7	255.2
Interest expense	6.1	11.7	18.7	31.6
Other non-operating (income) expense, net	(3.2)	(5.1)	361.8	(16.0)
Earnings (loss) from continuing operations before income taxes	69.4	106.7	(169.8)	239.6
Income tax expense (benefit)	15.2	16.0	(50.9)	48.8
Earnings (loss) from continuing operations	54.2	90.7	(118.9)	190.8
Net earnings from discontinued operations, net of tax expense of $ -, $2.5, $ - and $7.2		4.8		3.0
(Loss) from disposal of discontinued businesses, net of tax (benefit) of $ -, ($5.0), ($1.4) and ($4.9)	(0.2)	(22.3)	(3.0)	(27.0)
Net (loss) from discontinued operations	(0.2)	(17.5)	(3.0)	(24.0)
Net earnings (loss)	54.0	73.2	(121.9)	166.8
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(6.2)	78.6	(8.2)	84.6
Derivative gain (loss), net	1.5	(2.7)	(12.3)	(15.9)
Pension and postretirement adjustments	(0.8)	5.5	286.8	11.2
Total other comprehensive (loss) income	(5.5)	81.4	266.3	79.9
Total comprehensive income	$ 48.5	$ 154.6	$ 144.4	$ 246.7
Earnings (loss) per share of common stock, continuing operations:
Basic	$ 1.13	$ 1.86	$ (2.48)	$ 3.90
Diluted	1.13	1.83	(2.48)	3.84
Earnings (loss) per share of common stock, discontinued operations:
Basic		(0.36)	(0.06)	(0.49)
Diluted		(0.35)	(0.06)	(0.48)
Net earnings (loss) per share of common stock:
Basic	1.13	1.50	(2.54)	3.41
Diluted	$ 1.13	$ 1.48	$ (2.54)	$ 3.36
Average number of common shares outstanding:
Basic	47.9	48.7	47.9	48.8
Diluted	48.0	49.5	47.9	49.6