Inventories - Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Inventory [Line Items]
Excess of FIFO over LIFO cost	$ (50.4)	$ (47.7)
Total LIFO inventories	73.4	65.5
Total FIFO inventories	110.4	110.4
Total inventories	183.8	175.9
Inventories carried at LIFO:
Inventory [Line Items]
Finished goods	85.4	74.7
Raw materials and work-in-process	38.4	38.5
Inventories carried at FIFO:
Inventory [Line Items]
Finished goods	53.2	52.8
Raw materials and work-in-process	$ 57.2	$ 57.6