Income Taxes - Rollforward of Deferred Tax Assets Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	$ 73.3	$ 102.4	$ 108.8
Change in assessment	(8.3)	(39.5)	(1.1)
Current year operations	25.3	10.4	(5.3)
Deferred Tax Assets, Valuation Allowance, Ending Balance	90.3	73.3	102.4
Domestic Tax Jurisdiction
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	0.0	0.0	0.0
Change in assessment	0.0	0.0	0.0
Current year operations	29.1	0.0	0.0
Deferred Tax Assets, Valuation Allowance, Ending Balance	29.1	0.0	0.0
State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	15.6	39.5	35.7
Change in assessment	(8.3)	(23.1)	0.0
Current year operations	(0.2)	(0.8)	3.8
Deferred Tax Assets, Valuation Allowance, Ending Balance	7.1	15.6	39.5
Foreign Tax Jurisdiction [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	57.7	62.9	73.1
Change in assessment		(16.4)	(1.1)
Current year operations	(3.6)	11.2	(9.1)
Deferred Tax Assets, Valuation Allowance, Ending Balance	$ 54.1	$ 57.7	$ 62.9