CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 723.6	$ 527.2	$ 1,394.3	$ 1,018.7
Cost of goods and services sold	408.5	332.1	807.3	656.6
Gross profit	315.1	195.1	587.0	362.1
Research and development	13.8	10.8	26.0	21.5
Selling, general and administrative expenses	92.7	77.7	172.9	149.5
Other expense (income) (Note 15)	(2.7)	3.0	1.2	(0.5)
Operating profit	211.3	103.6	386.9	191.6
Interest expense	1.9	2.0	3.8	4.0
Interest income	(0.2)	(0.2)	(0.3)	(1.0)
Other nonoperating (income) expense	(1.4)	(0.2)	(2.5)	0.1
Income before income taxes	211.0	102.0	385.9	188.5
Income tax expense	32.3	16.0	61.0	31.0
Equity in net income of affiliated companies	(8.6)	(5.2)	(13.6)	(8.0)
Net income	$ 187.3	$ 91.2	$ 338.5	$ 165.5
Net income per share:
Basic (in dollars per share)	$ 2.53	$ 1.24	$ 4.58	$ 2.24
Diluted (in dollars per share)	$ 2.47	$ 1.21	$ 4.47	$ 2.19
Weighted average shares outstanding:
Basic (in shares)	74.0	73.8	74.0	73.8
Diluted (in shares)	75.7	75.5	75.8	75.5