CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 830.1	$ 908.4	$ 971.2
Cost of sales	553.0	601.3	650.2
Gross margin	277.1	307.1	321.0
Selling, general and administrative expenses	193.4	202.3	218.8
Research and development expenses	34.6	35.7	35.2
Restructuring and impairment charges	24.1	16.9	66.6
Other operating (income) expense, net	0.1	(33.1)	(144.0)
Operating income	24.9	85.3	144.4
Equity income in unconsolidated joint ventures	1.4	1.8	4.4
Other income (expense), net	8.8	(0.7)	1.1
Interest expense, net	(0.8)	(10.1)	(9.5)
Income before income tax expense	34.3	76.3	140.4
Income tax expense	8.2	19.7	23.8
Net income	$ 26.1	$ 56.6	$ 116.6
Basic earnings per share (in dollars per share)	$ 1.40	$ 3.04	$ 6.21
Diluted earnings per share (in dollars per share)	$ 1.40	$ 3.03	$ 6.15
Shares used in computing:
Basic earnings per share (in shares)	18.6	18.6	18.8
Diluted earnings per share (in shares)	18.6	18.7	19.0