Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 482.8	$ 240.4
Cost of sales	307.9	166.2
Gross profit	174.9	74.2
Operating expenses:
Selling, general and administrative expenses	90.9	47.1
Research and development expenses	15.3	6.5
Restructuring costs	2.3	0.9
Total operating expenses	108.5	54.5
Income from operations	66.4	19.7
Other non-operating income and expense:
Loss on settlement of pension plan		5.1
Interest expense, net	19.8	1.8
Other non-operating expense/(income), net	1.1	(0.1)
Total other non-operating (income) expense, net	20.9	6.8
Income before income taxes	45.5	12.9
Provision for income taxes	10.3	3.9
Net income	$ 35.2	$ 9.0
Weighted average shares, basic	64.2	29.1
Weighted average shares, diluted	64.4	29.2
Net income per share:
Basic	$ 0.55	$ 0.31
Diluted	0.55	0.31
Cash dividend declared per share	$ 0.17	$ 0.17