CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 456.1	$ 431.7	$ 1,369.3	$ 1,294.9
Cost of goods and services sold	308.3	296.1	916.8	882.7
Gross profit	147.8	135.6	452.5	412.2
Research and development	9.3	10.1	28.7	30.5
Selling, general and administrative expenses	64.8	64.9	203.7	203.2
Other expense (income) (Note 15)	6.4	(0.2)	1.6	4.0
Operating profit	67.3	60.8	218.5	174.5
Interest expense	2.1	2.0	6.4	6.1
Interest income	(1.0)	(0.5)	(2.5)	(1.4)
Other nonoperating expense (income)	(1.3)	1.8	(0.2)	5.1
Income before income taxes	64.9	61.1	214.4	174.9
Income tax expense	10.9	8.0	42.5	26.5
Equity in net income of affiliated companies	(2.3)	(2.1)	(5.9)	(6.5)
Net income	$ 56.3	$ 55.2	$ 177.8	$ 154.9
Net income per share:
Basic (in dollars per share)	$ 0.76	$ 0.75	$ 2.40	$ 2.10
Diluted (in dollars per share)	$ 0.75	$ 0.73	$ 2.36	$ 2.05
Weighted average shares outstanding:
Basic (in shares)	74.0	73.9	73.9	73.9
Diluted (in shares)	75.5	75.7	75.3	75.4