Goodwill and Intangible Assets - Intangible Assets by Major Class (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Schedule of Intangible Assets by Major Class [Line Items]
Cost	$ 76.1	$ 76.8
Accumulated amortization	(65.3)	(61.7)
Net	10.8	15.1
Patents and licensing
Schedule of Intangible Assets by Major Class [Line Items]
Cost	24.7	24.8
Accumulated amortization	(23.0)	(21.8)
Net	1.7	3.0
Technology
Schedule of Intangible Assets by Major Class [Line Items]
Cost	3.3	3.3
Accumulated amortization	(2.7)	(2.5)
Net	0.6	0.8
Trademarks
Schedule of Intangible Assets by Major Class [Line Items]
Cost	1.2	1.2
Accumulated amortization	(1.2)	(1.2)
Net	0.0	0.0
Customer relationships
Schedule of Intangible Assets by Major Class [Line Items]
Cost	38.9	39.5
Accumulated amortization	(30.8)	(29.0)
Net	8.1	10.5
Customer contracts
Schedule of Intangible Assets by Major Class [Line Items]
Cost	8.0	8.0
Accumulated amortization	(7.6)	(7.2)
Net	$ 0.4	$ 0.8