CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 548.0	$ 456.1	$ 1,566.7	$ 1,369.3
Cost of goods and services sold	353.4	308.3	1,010.0	916.8
Gross profit	194.6	147.8	556.7	452.5
Research and development	12.5	9.3	34.0	28.7
Selling, general and administrative expenses	76.2	64.8	225.7	203.7
Other expense (income) (Note 15)	6.7	6.4	6.2	1.6
Operating profit	99.2	67.3	290.8	218.5
Interest expense	2.1	2.1	6.1	6.4
Interest income	(0.2)	(1.0)	(1.2)	(2.5)
Other nonoperating (income) expense	(0.4)	1.3	(0.3)	0.2
Income before income taxes	97.7	64.9	286.2	214.4
Income tax expense	21.1	10.9	52.1	42.5
Equity in net income of affiliated companies	(5.7)	(2.3)	(13.7)	(5.9)
Net income	$ 82.3	$ 56.3	$ 247.8	$ 177.8
Net income per share:
Basic (in dollars per share)	$ 1.11	$ 0.76	$ 3.35	$ 2.40
Diluted (in dollars per share)	$ 1.09	$ 0.75	$ 3.28	$ 2.36
Weighted average shares outstanding:
Basic (in shares)	73.9	74.0	73.9	73.9
Diluted (in shares)	75.8	75.5	75.6	75.3