Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Net operating loss carryforwards	$ 6.1	$ 10.0
Tax credit carryforwards	2.1	1.1
Pension and deferred compensation	28.9	22.7
Royalty acceleration	0.0	15.0
Other	17.9	22.4
Capitalized R&D expenses	30.1	23.9
Leases	21.5	18.6
Valuation allowance	(12.8)	(15.5)
Total deferred tax assets	93.8	98.2
Deferred tax liabilities:
Property, plant, and equipment	60.9	61.7
Tax on undistributed earnings of subsidiaries	0.4	3.8
Leases	22.0	18.1
Other	5.0	1.6
Total deferred tax liabilities	88.3	85.2
Net deferred tax asset	$ 5.5	$ 13.0