v3.26.1
Fair Value Measurement - Schedule of Level III Financial Liabilities Measured at Fair Value (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
fund
Mar. 31, 2025
USD ($)
fund
Realized and unrealized (gains) losses, net    
Number of consolidated funds | fund 2 1
Level III | Loans Payable of Consolidated Funds    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of period $ 9,423.1 $ 6,809.1
Initial consolidation/deconsolidation of funds 388.4 193.8
Borrowings 1,647.1 782.1
Paydowns (486.9) (242.1)
Sales (569.4) (6.5)
Realized and unrealized (gains) losses, net    
Included in earnings (184.2) 1.2
Included in other comprehensive income (61.4) 142.7
Balance, end of period 10,156.7 7,680.3
Changes in unrealized (gains) losses included in earnings related to financial liabilities still held at the reporting date (166.4) 10.0
Changes in unrealized (gains) losses included in other comprehensive income related to financial liabilities still held at the reporting date $ (68.5) $ 133.5
Fair value, liability, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income Net investment income (loss) of Consolidated Funds Net investment income (loss) of Consolidated Funds