Business, Product and Geographical Area Information and Concentration of Risk - Schedule of Net Sales, Income Taxes Paid, and Property, Plant and Equipment, Net by Geographical Area (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024		Dec. 31, 2023
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales		$ 3,373.0	$ 3,024.0	[1]	$ 3,087.0	[1]
Property, plant and equipment, net		1,145.2	1,161.2	[2]	1,052.1
Domestic
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales		3,252.1	2,920.0		2,986.0
Property, plant and equipment, net		1,118.4	1,134.5		1,025.3
Foreign
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	[3]	120.9	104.0		101.0
Property, plant and equipment, net	[3]	$ 26.8	$ 26.7		$ 26.8

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

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

[3] Foreign reflects our London, Ontario production facility.