Asset Retirement Obligations - Changes to Asset Retirement Obligation (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligation at beginning of period		$ 29.4	$ 31.8
Accretion expense		1.3	1.2
Liabilities Incurred			1.0
Payments		(0.3)	(0.1)
Revisions in estimated cash flows	[1]	(0.2)	(4.5)
Asset retirement obligation at end of period		$ 30.2	$ 29.4

[1] For 2021, primarily consists of an asset retirement adjustment of $4.2 million related to the San Lorenzo, California facility closure.