CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 2,146.9	$ 1,839.9	$ 1,717.4
Cost of goods and services sold	1,379.1	1,234.2	1,172.0
Gross profit	767.8	605.7	545.4
Research and development	46.9	38.9	40.3
Selling, general and administrative expenses	302.0	272.7	262.9
Other expense (income)	12.0	(2.5)	1.9
Operating profit	406.9	296.6	240.3
Interest Expense	8.2	8.5	8.4
Interest income	(1.4)	(3.8)	(2.1)
Other nonoperating (income) expense	(1.2)	0.1	(6.7)
Income before income taxes	401.3	291.8	240.7
Income tax expense	72.5	59.0	41.4
Equity in net income of affiliated companies	(17.4)	(8.9)	(7.6)
Net income	$ 346.2	$ 241.7	$ 206.9
Net income per share:
Basic (in dollars per share)	$ 4.68	$ 3.27	$ 2.80
Diluted (in dollars per share)	$ 4.57	$ 3.21	$ 2.74
Weighted average shares outstanding:
Basic (in shares)	73.9	74.0	73.9
Diluted (in shares)	75.8	75.4	75.4