Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Tax Credit Carryforward [Line Items]
Income tax (expense) benefit		$ 26.8	$ (27.6)	$ (28.2)
Effective tax rate (percent)		(5.60%)	28.60%	107.00%
Tax-effected operating loss carryforwards		$ 260.9
Capital loss carryforward		47.4	$ 106.5
Valuation allowance on deferred tax assets		323.0	225.5
Unrecognized tax benefits that would impact effective tax rate		17.1
Decrease in unrecognized tax benefits due to lapse of statute of limitations		2.4	$ 0.4	$ 0.7
Forecast
Tax Credit Carryforward [Line Items]
Decrease in unrecognized tax benefits due to lapse of statute of limitations	$ 3.8
United States
Tax Credit Carryforward [Line Items]
Valuation allowance on deferred tax assets		54.1
Luxembourg
Tax Credit Carryforward [Line Items]
Valuation allowance on deferred tax assets		223.8
State
Tax Credit Carryforward [Line Items]
Valuation allowance on deferred tax assets		21.5
Tax Year 2024 - 2026
Tax Credit Carryforward [Line Items]
Capital loss carryforward		39.5
Indefinite
Tax Credit Carryforward [Line Items]
Capital loss carryforward		7.9
Tax Year 2028 - 2032 | Foreign and state jurisdiction
Tax Credit Carryforward [Line Items]
Capital loss carryforward		18.6
Tax Year 2023 - 2037 | Foreign and state jurisdiction
Tax Credit Carryforward [Line Items]
Capital loss carryforward		$ 9.5