Inventories - Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Excess of FIFO over LIFO cost	$ (46.8)	$ (49.7)
Total LIFO inventories	75.2	81.7
Total FIFO inventories	128.4	124.9
Total inventories	203.6	206.6
Inventories carried at LIFO:
Inventory [Line Items]
Finished goods	78.8	85.0
Raw materials and work-in-process	43.2	46.4
Inventories carried at FIFO:
Inventory [Line Items]
Finished goods	85.2	68.9
Raw materials and work-in-process	$ 43.2	$ 56.0