v3.26.1
Assets and Liabilities Measured at Fair Value on a Recurring Basis - Schedule of Fair Value of Net Unrealized Gains (Losses) Included in Changes in Net Assets Attributable to Investments and Loans Payable Using Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair Value, Recurring Basis, Unobservable Input, Reconciliation, Asset Gain (Loss), Statement Of Income, Extensible List Not Disclosed Flag     investments and loans payable  
Total realized and unrealized gains (losses) included in changes in net assets $ 195.2 $ 10.2 $ 219.0 $ 36.5
Loans Payable        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Total realized and unrealized gains (losses) included in changes in net assets - loans payable (5.9) (1.1) (5.6) 3.2
Real Estate Properties        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Total realized and unrealized gains (losses) included in changes in net assets (39.7) 102.0 (42.4) 34.7
Real Estate Joint Ventures        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Total realized and unrealized gains (losses) included in changes in net assets 79.1 (56.7) 97.2 36.3
Real Estate Operating Business        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Total realized and unrealized gains (losses) included in changes in net assets 161.5 (27.8) 170.9 (28.0)
Loans Receivable        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Total realized and unrealized gains (losses) included in changes in net assets $ (5.7) $ (7.3) $ (6.7) $ (6.5)