Condensed Consolidated Statements of Operations - 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	$ 442.9	$ 228.5	$ 1,392.2	$ 706.2
Cost of sales	285.9	156.5	893.3	481.8
Gross profit	157.0	72.0	498.9	224.4
Operating expenses:
Selling, general and administrative expenses	87.9	44.9	270.8	135.4
Research and development expenses	14.4	5.7	44.4	18.5
Restructuring costs	6.2	0.6	11.7	2.1
Total operating expenses	108.5	51.2	326.9	156.0
Income from operations	48.5	20.8	172.0	68.4
Other non-operating income and expense:
Loss on settlement of pension plan				5.1
Interest expense, net	18.2	2.0	56.6	5.8
Other non-operating expense/(income), net	(0.4)	0.7	1.1	0.2
Total other non-operating (income) expense, net	17.8	2.7	57.7	11.1
Income before income taxes	30.7	18.1	114.3	57.3
Provision for income taxes	5.0	5.8	24.4	17.0
Net income	$ 25.7	$ 12.3	$ 89.9	$ 40.3
Weighted average shares, basic	64.4	29.0	64.3	29.1
Weighted average shares, diluted	64.6	29.0	64.5	29.2
Net income per share:
Basic	$ 0.40	$ 0.42	$ 1.40	$ 1.39
Diluted	0.40	0.42	1.39	1.38
Cash dividend declared per share	$ 0.17	$ 0.17	$ 0.51	$ 0.51