Inventory (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Inventory Disclosure [Abstract]
Cost of goods sold, amortization of operating materials					$ 1.2	$ 1.3
Fixed production overhead to cost of inventory	$ 0.0	$ 1.3	$ 0.0	$ 1.5
Net expense related to the liquid metal spill		3.6
Insurance recovery received during the period		$ 1.5
Negative operating efficiency variances				$ 1.5