CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 376.7	$ 344.5	$ 1,126.8	$ 1,040.1
Cost of goods and services sold	255.6	236.2	749.1	703.9
Gross profit	121.1	108.3	377.7	336.2
Research and development	9.0	8.5	27.2	24.1
Selling, general and administrative expenses	58.3	54.6	178.9	170.6
Other expense (Note 12)	2.5	48.7	29.1	58.1
Operating profit (loss)	51.3	(3.5)	142.5	83.4
Interest expense	2.2	3.7	6.7	11.2
Interest income	0.2	0.5	0.8	1.3
Income (loss) before income taxes	49.3	(6.7)	136.6	73.5
Income tax expense (benefit)	14.4	(6.6)	38.3	15.1
Equity in net income of affiliated companies	2.7	1.6	6.2	3.8
Net income	$ 37.6	$ 1.5	$ 104.5	$ 62.2
Net income per share:
Basic (in dollars per share)	$ 0.51	$ 0.02	$ 1.43	$ 0.86
Diluted (in dollars per share)	$ 0.50	$ 0.02	$ 1.40	$ 0.85
Weighted average shares outstanding:
Basic (in shares)	73.3	72.2	73.0	71.9
Diluted (in shares)	75.0	73.9	74.7	73.6
Dividends declared per share	$ 0.13	$ 0.12	$ 0.37	$ 0.34