CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales	$ 1,599.1	$ 1,509.1	$ 1,399.8
Cost of goods and services sold	1,086.5	1,008.0	944.0
Gross profit	512.6	501.1	455.8
Research and development	39.1	36.8	34.1
Selling, general and administrative expenses	242.6	239.8	233.0
Other expense (Note 14)	2.0	27.7	60.1
Operating profit	228.9	196.8	128.6
Interest expense	7.8	8.1	14.1
Interest income	1.3	1.1	1.6
Income before income taxes	222.4	189.8	116.1
Income tax expense	80.9	54.4	26.3
Equity in net income of affiliated companies	9.2	8.2	5.8
Net income	$ 150.7	$ 143.6	$ 95.6
Net income per share:
Basic (in dollars per share)	$ 2.04	$ 1.96	$ 1.33
Diluted (in dollars per share)	$ 1.99	$ 1.91	$ 1.30
Weighted average shares outstanding:
Basic (in shares)	73.9	73.3	72.0
Diluted (in shares)	75.8	75.0	73.8
Dividends declared per share (in dollars per share)	$ 0.54	$ 0.5	$ 0.46