Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 466.5	$ 237.3	$ 949.3	$ 477.7
Cost of sales	299.5	159.1	607.4	325.2
Gross profit	167.0	78.2	341.9	152.5
Operating expenses:
Selling, general and administrative expenses	92.0	43.4	182.9	90.5
Research and development expenses	14.7	6.2	30.0	12.7
Restructuring costs	3.2	0.6	5.5	1.5
Total operating expenses	109.9	50.2	218.4	104.7
Income from operations	57.1	28.0	123.5	47.8
Other non-operating income and expense:
Loss on settlement of pension plan				5.1
Interest expense, net	18.6	2.1	38.4	3.9
Other non-operating expense/(income), net	0.4	(0.3)	1.5	(0.4)
Total other non-operating (income) expense, net	19.0	1.8	39.9	8.6
Income before income taxes	38.1	26.2	83.6	39.2
Provision for income taxes	9.1	7.2	19.4	11.2
Net income	$ 29.0	$ 19.0	$ 64.2	$ 28.0
Weighted average shares, basic	64.3	29.0	64.3	29.1
Weighted average shares, diluted	64.5	29.1	64.5	29.2
Net income per share:
Basic	$ 0.45	$ 0.66	$ 1.00	$ 0.96
Diluted	0.45	0.65	1.00	0.96
Cash dividend declared per share	$ 0.17	$ 0.17	$ 0.34	$ 0.34