CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 527.2	$ 469.7	$ 1,018.7	$ 913.2
Cost of goods and services sold	332.1	311.8	656.6	608.5
Gross profit	195.1	157.9	362.1	304.7
Research and development	10.8	9.6	21.5	19.4
Selling, general and administrative expenses	77.7	70.3	149.5	138.9
Other expense (income) (Note 15)	3.0	(2.5)	(0.5)	(4.8)
Operating profit	103.6	80.5	191.6	151.2
Interest expense	2.0	2.0	4.0	4.3
Interest income	(0.2)	(0.6)	(1.0)	(1.5)
Other nonoperating (income) expense	(0.2)	(0.5)	0.1	(1.1)
Income before income taxes	102.0	79.6	188.5	149.5
Income tax expense	16.0	15.5	31.0	31.6
Equity in net income of affiliated companies	(5.2)	(2.0)	(8.0)	(3.6)
Net income	$ 91.2	$ 66.1	$ 165.5	$ 121.5
Net income per share:
Basic (in dollars per share)	$ 1.24	$ 0.90	$ 2.24	$ 1.64
Diluted (in dollars per share)	$ 1.21	$ 0.88	$ 2.19	$ 1.61
Weighted average shares outstanding:
Basic (in shares)	73.8	73.7	73.8	73.9
Diluted (in shares)	75.5	75.1	75.5	75.3