Inventories - Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Inventory [Line Items]
Excess of FIFO over LIFO cost	$ (54.9)	$ (50.4)
Total LIFO inventories	65.6	73.4
Total FIFO inventories	132.9	110.4
Total inventories	198.5	183.8
Inventories carried at LIFO:
Inventory [Line Items]
Finished goods	85.0	85.4
Raw materials and work-in-process	35.5	38.4
Inventories carried at FIFO:
Inventory [Line Items]
Finished goods	64.3	53.2
Raw materials and work-in-process	$ 68.6	$ 57.2