Income Taxes - Rollforward of Deferred Tax Assets Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	$ 90.3	$ 73.3	$ 102.4
Change in assessment	0.1	(8.3)	(39.5)
Current year operations	6.5	25.3	10.4
Deferred Tax Assets, Valuation Allowance, Ending Balance	96.9	90.3	73.3
Domestic Tax Jurisdiction
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	29.1	0.0	0.0
Change in assessment	0.0	0.0	0.0
Current year operations	(0.6)	29.1	0.0
Deferred Tax Assets, Valuation Allowance, Ending Balance	28.5	29.1	0.0
State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	7.1	15.6	39.5
Change in assessment	0.0	(8.3)	(23.1)
Current year operations	(1.3)	(0.2)	(0.8)
Deferred Tax Assets, Valuation Allowance, Ending Balance	5.8	7.1	15.6
Foreign Tax Jurisdiction [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance, Beginning Balance	54.1	57.7	62.9
Change in assessment	0.1	0.0	(16.4)
Current year operations	8.4	(3.6)	11.2
Deferred Tax Assets, Valuation Allowance, Ending Balance	$ 62.6	$ 54.1	$ 57.7