Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities and Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Investment in partnerships	$ 74.1	$ 73.4
Employee compensation	1.2	1.3
Other	3.0	2.6
Cash flow hedge	0.0	1.6
Total deferred tax assets	78.3	78.9
Valuation allowance	0.0	0.0
Deferred tax assets, net of valuation allowance	78.3	78.9
Deferred tax liabilities:
Other	0.8	0.6
Total deferred tax liabilities	0.8	0.6
Net deferred tax assets	$ 77.5	$ 78.3