Income Tax - Narrative (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Contingency [Line Items]
Change in valuation allowance		$ 20,000,000.0		$ 19,600,000	$ 2,500,000	$ (700,000)
Non-taxable gains	$ 77,900,000
Non-deductible adjustment related to interest expense		$ 45,800,000
Goodwill impairment				$ 0	$ 0	$ 845,000,000.0
Statutory federal income tax rate				21.00%	21.00%	21.00%
Undistributed earnings of foreign subsidiaries	48,200,000			$ 48,200,000	$ 44,100,000
Remaining unrecognized tax benefits	11,600,000			11,600,000	5,000,000.0
Significant change in unrecognized tax benefit	49,100,000			49,100,000
Domestic | General business tax credit carryforward
Income Tax Contingency [Line Items]
Capital loss carryforwards, tax effect	90,600,000			90,600,000
Operating loss carryforwards, not subject to expiration	14,000,000.0			14,000,000.0
Foreign | General business tax credit carryforward
Income Tax Contingency [Line Items]
Capital loss carryforwards, tax effect	189,500,000			189,500,000
Operating loss carryforwards, not subject to expiration	$ 40,200,000			$ 40,200,000
Canada
Income Tax Contingency [Line Items]
Statutory federal income tax rate				26.00%
Minimum
Income Tax Contingency [Line Items]
Statutes of limitations, term				3 years
Minimum | Europe
Income Tax Contingency [Line Items]
Statutory federal income tax rate				9.00%
Maximum
Income Tax Contingency [Line Items]
Statutes of limitations, term				7 years
Maximum | Europe
Income Tax Contingency [Line Items]
Statutory federal income tax rate				25.80%
Americas
Income Tax Contingency [Line Items]
Goodwill impairment			$ 845,000,000.0	$ 0	$ 0