Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Gross carrying value	$ 57.7	$ 57.7
Accumulated impairment loss	(38.9)	(38.9)
Net carrying value	$ 18.8	$ 18.8	[1]

[1] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.