CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales	$ 1,717.4	$ 1,599.1	$ 1,509.1
Cost of goods and services sold	1,172.0	1,086.2	1,007.7
Gross profit	545.4	512.9	501.4
Research and development	40.3	39.1	36.8
Selling, general and administrative expenses	262.9	246.0	239.6
Other expense (Note 15)	1.9	2.0	29.8
Operating profit	240.3	225.8	195.2
Interest expense	8.4	7.8	8.1
Interest income	(2.1)	(1.3)	(1.1)
Other nonoperating income	(6.7)	(3.1)	(1.6)
Income before income taxes	240.7	222.4	189.8
Income tax expense	41.4	80.9	54.4
Equity in net income of affiliated companies	(7.6)	(9.2)	(8.2)
Net income	$ 206.9	$ 150.7	$ 143.6
Net income per share:
Basic (in dollars per share)	$ 2.80	$ 2.04	$ 1.96
Diluted (in dollars per share)	$ 2.74	$ 1.99	$ 1.91
Weighted average shares outstanding:
Basic (in shares)	73.9	73.9	73.3
Diluted (in shares)	75.4	75.8	75.0
Dividends declared per share (in dollars per share)	$ 0.58	$ 0.54	$ 0.5