CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
NET SALES	[1]	$ 447.7	$ 403.7	$ 1,317.7	$ 1,262.9
Cost of sales		318.3	292.4	946.8	907.9
GROSS MARGIN		129.4	111.3	370.9	355.0
OPERATING EXPENSES AND INCOME
Selling, general and administrative expenses		45.9	46.4	137.9	138.8
Research, development and engineering expenses		10.0	9.7	29.8	30.2
Equity, royalty and interest income from investees		8.4	8.1	25.1	26.7
Other operating (income) expense, net		0.0	0.1	(0.2)	1.1
OPERATING INCOME		81.9	63.2	228.5	211.6
Interest expense		8.5	10.4	25.4	31.4
Other (expense) income, net		(1.7)	0.9	2.1	3.7
INCOME BEFORE INCOME TAXES		71.7	53.7	205.2	183.9
Income tax expense		16.9	9.9	45.8	38.4
NET INCOME		$ 54.8	$ 43.8	$ 159.4	$ 145.5
PER SHARE DATA:
Weighted-average shares for basic EPS (in shares)		82.0	83.2	82.7	83.3
Weighted-average shares for diluted EPS (in shares)		82.7	83.6	83.3	83.6
Basic earnings per share (in dollars per share)		$ 0.67	$ 0.53	$ 1.93	$ 1.75
Diluted earnings per share (in dollars per share)		$ 0.66	$ 0.52	$ 1.91	$ 1.74

[1] Includes sales to related parties of $13.7 million and $42.2 million for the three and nine months ended September 30, 2025, respectively, compared with $12.5 million and $112.2 million for the three and nine months ended September 30, 2024, respectively.