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	$ 400.8	$ 466.5	$ 835.0	$ 949.3
Cost of sales	257.4	299.5	538.6	607.4
Gross profit	143.4	167.0	296.4	341.9
Operating expenses:
Selling, general and administrative expenses	75.8	92.0	162.9	182.9
Impairment of goodwill and intangible asset			147.5
Research and development expenses	14.0	14.7	28.8	30.0
Restructuring costs	1.5	3.2	3.1	5.5
Total operating expenses	91.3	109.9	342.3	218.4
(Loss)/Income from operations	52.1	57.1	(45.9)	123.5
Other non-operating income and expense:
Interest expense, net	18.8	18.6	36.2	38.4
Other non-operating expense, net	2.5	0.4	1.1	1.5
Total other non-operating (income) expense, net	21.3	19.0	37.3	39.9
(Loss)/Income before income taxes	30.8	38.1	(83.2)	83.6
Provision for income taxes	9.1	9.1	11.8	19.4
Net (loss)/income	$ 21.7	$ 29.0	$ (95.0)	$ 64.2
Weighted average shares, basic	64.6	64.3	64.5	64.3
Weighted average shares, diluted	64.7	64.5	64.5	64.5
Net (loss)/income per share:
Basic	$ 0.34	$ 0.45	$ (1.47)	$ 1.00
Diluted	0.34	0.45	(1.47)	1.00
Cash dividend declared per share	$ 0.04	$ 0.17	$ 0.21	$ 0.34