Goodwill and Intangible Assets - Intangible Assets by Major Class (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Intangible Assets by Major Class [Line Items]
Cost	$ 76.8	$ 80.2
Accumulated amortization	(61.7)	(61.8)
Net	15.1	18.4
Patents and licensing
Schedule of Intangible Assets by Major Class [Line Items]
Cost	24.8	24.5
Accumulated amortization	(21.8)	(20.6)
Net	3.0	3.9
Technology
Schedule of Intangible Assets by Major Class [Line Items]
Cost	3.3	3.3
Accumulated amortization	(2.5)	(2.2)
Net	0.8	1.1
Trademarks
Schedule of Intangible Assets by Major Class [Line Items]
Cost	1.2	1.9
Accumulated amortization	(1.2)	(1.8)
Net	0.0	0.1
Customer relationships
Schedule of Intangible Assets by Major Class [Line Items]
Cost	39.5	39.6
Accumulated amortization	(29.0)	(27.2)
Net	10.5	12.4
Customer contracts
Schedule of Intangible Assets by Major Class [Line Items]
Cost	8.0	10.9
Accumulated amortization	(7.2)	(10.0)
Net	$ 0.8	$ 0.9