CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 398.2	$ 376.7	$ 1,183.5	$ 1,126.8
Cost of goods and services sold	273.2	255.6	799.4	749.1
Gross profit	125.0	121.1	384.1	377.7
Research and development	9.1	9.0	29.4	27.2
Selling, general and administrative expenses	61.5	58.3	183.7	178.9
Other (income) expense (Note 12)	(9.5)	2.5	3.1	29.1
Operating profit	63.9	51.3	167.9	142.5
Interest expense	1.3	2.2	5.7	6.7
Interest income	0.3	0.2	0.9	0.8
Income before income taxes	62.9	49.3	163.1	136.6
Income tax expense	14.0	14.4	19.1	38.3
Equity in net income of affiliated companies	2.1	2.7	6.7	6.2
Net income	$ 51.0	$ 37.6	$ 150.7	$ 104.5
Net income per share:
Basic (in dollars per share)	$ 0.69	$ 0.51	$ 2.04	$ 1.43
Diluted (in dollars per share)	$ 0.67	$ 0.50	$ 1.99	$ 1.40
Weighted average shares outstanding:
Basic (in shares)	74.2	73.3	73.8	73.0
Diluted (in shares)	75.9	75.0	75.8	74.7
Dividends declared per share	$ 0.14	$ 0.13	$ 0.40	$ 0.37