Goodwill and Purchased Intangible Assets - Schedule of Gross Goodwill and Other Purchased Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes in the carrying amount of gross goodwill and other purchased intangibles
Balance at the beginning of the period	$ 256.0	$ 267.5
Amortization expense	(6.8)	(6.8)
Currency translation adjustments and other	2.1	(4.7)
Balance at the end of the period	251.3	256.0
Composite Materials
Changes in the carrying amount of gross goodwill and other purchased intangibles
Balance at the beginning of the period	86.9	93.4
Amortization expense	(1.8)	(1.8)
Currency translation adjustments and other	2.1	(4.7)
Balance at the end of the period	87.2	86.9
Engineered Products
Changes in the carrying amount of gross goodwill and other purchased intangibles
Balance at the beginning of the period	169.1	174.1
Amortization expense	(5.0)	(5.0)
Currency translation adjustments and other	0.0	0.0
Balance at the end of the period	$ 164.1	$ 169.1