CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 443.5	$ 415.7
Cost of goods and services sold	296.7	281.3
Gross profit	146.8	134.4
Research and development	9.8	9.6
Selling, general and administrative expenses	68.6	68.3
Other (income) expense (Note 15)	(2.3)	3.1
Operating profit	70.7	53.4
Interest expense	2.3	1.9
Interest income	(0.9)	(0.6)
Other nonoperating income	(0.6)	(1.6)
Income before income taxes	69.9	53.7
Income tax expense	16.1	12.5
Equity in net income of affiliated companies	(1.6)	(2.4)
Net income	$ 55.4	$ 43.6
Net income per share:
Basic (in dollars per share)	$ 0.75	$ 0.59
Diluted (in dollars per share)	$ 0.73	$ 0.58
Weighted average shares outstanding:
Basic (in shares)	74.1	73.9
Diluted (in shares)	75.3	75.5