Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Deferred Tax Assets
State net operating loss carryforwards	$ 13.7	$ 13.8
Foreign loss carryforwards	19.6	17.7
Foreign tax credits	16.5	16.3
Other	22.5	33.5
Total deferred tax assets	72.3	81.3
Valuation allowance	(47.0)	(44.8)
Deferred tax assets, net of valuation allowance	25.3	36.5
Deferred Tax Liabilities
Intangible asset amortization	(392.6)	(353.0)
Non-deductible intangible amortization	(82.9)	(101.4)
Junior convertible securities interest	(58.3)	(92.6)
Other	(22.8)	(8.0)
Total deferred tax liabilities	(556.6)	(555.0)
Deferred tax liability (net)	(531.3)	(518.5)
Carryforwards valuation allowance	$ 17.8	$ 15.7