Contingencies and Commitments - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 29, 2024 policy_holder	Mar. 08, 2024 USD ($)
Loss Contingencies [Line Items]
Loss contingency, estimate	$ 150.0
Loss contingency accrual	147.5				$ 147.5
Number of policyholders deemed not economically harmed | policy_holder				22
Guaranty liabilities	45.0	$ 63.0
Premium expected to be collected	86.0	99.0
Estimated insurance recoveries	41.0	36.0
Operating lease ROU asset	58.0	85.0
Present value of minimum lease payments	$ 63.0	$ 89.0
Weighted average discount rate, operating lease	4.10%	4.00%
Weighted average remaining operating lease term	3 years	4 years
Operating lease expense	$ 32.0	$ 36.0	$ 42.0
Certain Financing Arrangments
Loss Contingencies [Line Items]
Present value of minimum lease payments	$ 396.0	$ 511.0