CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales	$ 810.8	$ 830.1	$ 908.4
Cost of sales	554.0	553.0	601.3
Gross margin	256.8	277.1	307.1
Selling, general and administrative expenses	176.6	193.4	202.3
Research and development expenses	28.1	34.6	35.7
Restructuring and impairment charges	97.1	24.1	16.9
Other operating (income) expense, net	0.0	0.1	(33.1)
Operating income (loss)	(45.0)	24.9	85.3
Equity income in unconsolidated joint ventures	0.0	1.4	1.8
Other income (expense), net	(0.9)	8.8	(0.7)
Interest income (expense), net	0.8	(0.8)	(10.1)
Income (loss) before income taxes	(45.1)	34.3	76.3
Income tax expense	16.7	8.2	19.7
Net income (loss)	$ (61.8)	$ 26.1	$ 56.6
Basic earnings (loss) per share (in dollars per share)	$ (3.40)	$ 1.40	$ 3.04
Diluted earnings (loss) per share (in dollars per share)	$ (3.40)	$ 1.40	$ 3.03
Shares used in computing:
Basic earnings (loss) per share (in shares)	18.2	18.6	18.6
Diluted earnings (loss) per share (in shares)	18.2	18.6	18.7