Property, Plant, and Equipment - Severance Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Severance liability at January 1	$ 16.2	$ 4.9	$ 0.7
Severance expense	1.6	11.3	4.6
Severance payments	0.0	0.0	(0.4)
Severance liability at December 31	$ 17.8	$ 16.2	$ 4.9