Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Exposure to the obligations of the investment entities	$ 200.8	$ 94.7
Variable Interest Entity, Not Primary Beneficiary | Company-Sponsored Private Funds
Variable Interest Entity [Line Items]
Exposure to the obligations of the investment entities	1,860.0	$ 752.3
Variable Interest Entity, Not Primary Beneficiary | Company Sponsored Funds
Variable Interest Entity [Line Items]
Unfunded lending commitment	$ 260.4