v3.25.2
Investments in Real Estate Funds - Schedule of carrying amount and maximum exposure to loss relating to VIEs (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Variable Interest Entity [Line Items]    
Carrying Amount $ 24,974.9 $ 25,245.9
Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Carrying Amount 852.2  
Maximum Exposure to Loss $ 935.0  
Variable Interest Entity, Not Primary Beneficiary | LCS SHIP Venture I, LLC    
Variable Interest Entity [Line Items]    
Account Interest 90.00%  
Carrying Amount $ 43.6  
Maximum Exposure to Loss $ 43.6  
Variable Interest Entity, Not Primary Beneficiary | Veritas Trophy VI, LLC    
Variable Interest Entity [Line Items]    
Account Interest 90.40%  
Carrying Amount $ 127.2  
Maximum Exposure to Loss $ 127.2  
Variable Interest Entity, Not Primary Beneficiary | SP V - II, LLC    
Variable Interest Entity [Line Items]    
Account Interest 61.80%  
Carrying Amount $ 85.9  
Maximum Exposure to Loss $ 92.3  
Variable Interest Entity, Not Primary Beneficiary | Veritas Trophy VI, LLC    
Variable Interest Entity [Line Items]    
Account Interest 60.00%  
Carrying Amount $ 9.3  
Maximum Exposure to Loss $ 9.3  
Variable Interest Entity, Not Primary Beneficiary | Silverpeak NRE FundCo LLC    
Variable Interest Entity [Line Items]    
Account Interest 90.00%  
Carrying Amount $ 73.0  
Maximum Exposure to Loss $ 76.7  
Variable Interest Entity, Not Primary Beneficiary | IDR - Core Property Index Fund, LLC    
Variable Interest Entity [Line Items]    
Account Interest 0.80%  
Carrying Amount $ 34.5  
Maximum Exposure to Loss $ 34.5  
Variable Interest Entity, Not Primary Beneficiary | Townsend Group Value-Add Fund    
Variable Interest Entity [Line Items]    
Account Interest 99.00%  
Carrying Amount $ 188.7  
Maximum Exposure to Loss $ 218.4  
Variable Interest Entity, Not Primary Beneficiary | Silverpeak NRE FundCo LLC    
Variable Interest Entity [Line Items]    
Account Interest 90.00%  
Carrying Amount $ 17.4  
Maximum Exposure to Loss $ 17.4  
Variable Interest Entity, Not Primary Beneficiary | Grubb Southeast Real Estate Fund VI, LLC    
Variable Interest Entity [Line Items]    
Account Interest 66.70%  
Carrying Amount $ 11.3  
Maximum Exposure to Loss $ 11.3  
Variable Interest Entity, Not Primary Beneficiary | Silverpeak NRE FundCo 2 LLC    
Variable Interest Entity [Line Items]    
Account Interest 90.00%  
Carrying Amount $ 61.6  
Maximum Exposure to Loss $ 84.3  
Variable Interest Entity, Not Primary Beneficiary | JCR Capital - REA Preferred Equity Parallel Fund    
Variable Interest Entity [Line Items]    
Account Interest 31.10%  
Carrying Amount $ 100.9  
Maximum Exposure to Loss $ 110.8  
Variable Interest Entity, Not Primary Beneficiary | Silverpeak NRE FundCo 3 LLC    
Variable Interest Entity [Line Items]    
Account Interest 90.00%  
Carrying Amount $ 98.8  
Maximum Exposure to Loss $ 109.2