CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 387.7	$ 362.1
Cost of goods and services sold	253.6	238.8
Gross profit	134.1	123.3
Research and development	10.3	9.4
Selling, general and administrative expenses	61.6	58.1
Other expense (Note 12)	0.9	25.8
Operating profit	61.3	30.0
Interest expense	2.1	2.5
Interest income	0.3	0.3
Income before income taxes	59.5	27.8
Income tax expense	2.2	6.9
Equity in net income of affiliated companies	3.6	1.2
Net income	$ 60.9	$ 22.1
Net income per share:
Basic (in dollars per share)	$ 0.83	$ 0.31
Diluted (in dollars per share)	$ 0.81	$ 0.30
Weighted average shares outstanding:
Basic (in shares)	73.3	72.5
Diluted (in shares)	74.9	74.1
Dividends declared per share	$ 0.13	$ 0.12