CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
NET SALES	[1]	$ 453.5	$ 432.6	$ 870.0	$ 859.2
Cost of sales		322.5	300.7	628.5	615.5
GROSS MARGIN		131.0	131.9	241.5	243.7
OPERATING EXPENSES AND INCOME
Selling, general and administrative expenses		46.1	49.1	92.0	92.4
Research, development and engineering expenses		10.7	10.4	19.8	20.5
Equity, royalty and interest income from investees		7.5	8.2	16.7	18.6
Other operating (income) expense, net		0.0	0.8	(0.2)	1.0
OPERATING INCOME		81.7	79.8	146.6	148.4
Interest expense		8.5	10.5	16.9	21.0
Other income, net		3.5	2.6	3.8	2.8
INCOME BEFORE INCOME TAXES		76.7	71.9	133.5	130.2
Income tax expense		16.8	15.7	28.9	28.5
NET INCOME		$ 59.9	$ 56.2	$ 104.6	$ 101.7
PER SHARE DATA:
Weighted-average shares for basic EPS (in shares)		82.5	83.4	82.6	83.4
Weighted-average shares for diluted EPS (in shares)		83.0	83.7	83.1	83.7
Basic earnings per share (in dollars per share)		$ 0.73	$ 0.67	$ 1.27	$ 1.22
Diluted earnings per share (in dollars per share)		$ 0.72	$ 0.67	$ 1.26	$ 1.22

[1] Includes sales to related parties of $14.8 million and $28.5 million for the three and six months ended June 30, 2025, respectively, compared with $17.4 million and $99.7 million for the three and six months ended June 30, 2024, respectively.