CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 387.0	$ 456.7	$ 839.6	$ 916.5
Cost of sales	224.5	263.7	479.8	525.2
Gross profit	162.5	193.0	359.8	391.3
Operating expenses:
Selling, technical, general and administrative	113.4	126.4	238.6	268.8
Research and development	9.6	11.1	27.1	21.9
Total operating expenses	123.0	137.5	265.7	290.7
Operating profit	39.5	55.5	94.1	100.6
Other expense:
Interest expense, net	(16.9)	(18.2)	(33.6)	(56.3)
Foreign exchange loss	(12.8)	(28.3)	(38.6)	(1.2)
Other expense, net	(1.7)	(1.1)	(1.3)	(49.1)
Total other expense	(31.4)	(47.6)	(73.5)	(106.6)
Income (loss) before income taxes and non-controlling interests	8.1	7.9	20.6	(6.0)
Income tax (expense) benefit	(5.8)	6.8	(9.9)	17.2
Net income from continuing operations	2.3	14.7	10.7	11.2
(Loss) income from discontinued operations, net of tax	(1.1)	(13.3)	(0.9)	14.1
Net income	1.2	1.4	9.8	25.3
Net loss (income) attributable to non-controlling interests	0.0	0.1	0.0	(0.6)
Net income attributable to common stockholders	$ 1.2	$ 1.5	$ 9.8	$ 24.7
Earnings (loss) per share
Basic from continuing operations (in dollars per share)	$ 0.01	$ 0.06	$ 0.04	$ 0.04
Basic from discontinued operations (in dollars per share)	0	(0.05)	0	0.05
Basic attributable to common stockholders (in dollars per share)	0.01	0.01	0.04	0.09
Diluted from continuing operations (in dollars per share)	0.01	0.06	0.04	0.04
Diluted from discontinued operations (in dollars per share)	0	(0.05)	0	0.05
Diluted attributable to common stockholders (in dollars per share)	$ 0.01	$ 0.01	$ 0.04	$ 0.09
Weighted average common shares outstanding
Basic (in shares)	248.8	257.3	249.6	262.7
Diluted (in shares)	249.0	259.6	250.6	265.3