Other (Expense) Income, Net - Components of Other Income (Expense), Net (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Other Income and Expenses [Abstract]
Interest income		$ 0.2	$ 0.9
Net periodic postretirement and postemployment benefit cost		(1.2)	(0.3)
Unrealized (loss) gain on equity securities		(0.1)	0.2
Loss on disposition of property, plant and equipment		0.0	(0.2)
Gain on business interruption insurance recoveries	[1]	0.0	10.5
All other, net		(0.3)	(0.2)
Other (expense) income, net		$ (1.4)	$ 10.9

[1] Represents advances against business interruption insurance claims. We recognize such advances in the period in which the insurance proceeds are received or become realizable. During the quarters ended March 31, 2025 and March 31, 2024, we received net cash proceeds of $0.4 million and $9.7 million, respectively.