CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net sales	$ 388.0	$ 359.7	$ 750.1	$ 695.6
Cost of goods and services sold	254.7	241.5	493.5	467.7
Gross profit	133.3	118.2	256.6	227.9
Research and development	8.8	8.1	18.2	15.6
Selling, general and administrative expenses	62.5	60.8	120.6	116.0
Other expense (Note 12)	0.8	10.2	26.6	9.4
Operating profit	61.2	39.1	91.2	86.9
Interest expense	2.0	3.4	4.5	7.5
Interest income	0.3	0.4	0.6	0.8
Income before income taxes	59.5	36.1	87.3	80.2
Income tax expense	17.0	9.2	23.9	21.7
Equity in net income of affiliated companies	2.2	0.9	3.5	2.2
Net income	$ 44.7	$ 27.8	$ 66.9	$ 60.7
Net income per share:
Basic (in dollars per share)	$ 0.61	$ 0.39	$ 0.92	$ 0.84
Diluted (in dollars per share)	$ 0.60	$ 0.38	$ 0.90	$ 0.83
Weighted average shares outstanding:
Basic (in shares)	73.3	72.0	72.9	71.9
Diluted (in shares)	74.8	73.7	74.5	73.5
Dividends declared per share	$ 0.12	$ 0.11	$ 0.24	$ 0.22