Income Taxes - Schedule of Income Tax Expense Reconciliation Between U.S. Statutory Tax Rate and Effective Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income before income taxes	$ 1,168.2	$ 75.9	$ (152.9)
Income (loss) before income taxes	1,168.2	75.9	(150.2)
Amount
Income tax (expense) benefit at U.S. statutory federal rate	$ (245.3)	(16.0)	31.6
Tax Jurisdiction of Domicile [Extensible Enumeration]	UNITED STATES
State taxes, net of federal benefit	$ 20.0	1.7	11.2
Settlement of pre-existing relationships	353.6
Other	(11.4)
Deferred tax impact of REIT liquidation	562.9
Other	(3.9)
Changes in valuation allowance	(542.4)
Foreign tax effects	0.0
Changes in unrecognized tax benefits	3.0
Benefit of REIT status		31.9	24.8
Return to accrual		0.1	1.3
Permanent differences		(0.2)	(0.4)
Total income tax benefit	$ 136.5	$ 17.5	$ 68.5
Percent
Income tax expense at U.S. statutory federal rate	(21.00%)
State and local income taxes, net of federal effect	1.70%
Settlement of pre-existing relationships	30.30%
Other	(1.00%)
Deferred tax impact of REIT liquidation	48.10%
Other	(0.30%)
Changes in valuation allowance	(46.40%)
Foreign tax effects	0.00%
Changes in unrecognized tax benefits	0.30%
Total income tax benefit	11.70%