v3.25.1
Unconsolidated Affiliates - Schedule of Investments in Unconsolidated Affiliates (Detail) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Carrying Value $ 330.7 $ 328.4
Excess carrying value of investment over proportionate share of net assets $ 108.0 109.6
Orbit Private Investments Limited Partners    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 9.80%  
Carrying Value $ 204.3 203.9
Excess carrying value of investment over proportionate share of net assets $ 0.0 0.0
International Financial Data Services L.P.    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 50.00%  
Carrying Value $ 62.3 60.2
Excess carrying value of investment over proportionate share of net assets $ 27.2 28.0
Broadway Square Partners, LLP    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 50.00%  
Carrying Value $ 51.9 52.2
Excess carrying value of investment over proportionate share of net assets $ 28.4 28.6
Pershing Road Development Company, LLC    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 50.00%  
Carrying Value $ 10.3 10.1
Excess carrying value of investment over proportionate share of net assets 52.4 53.0
Other Unconsolidated Affiliates    
Schedule of Investments [Line Items]    
Carrying Value 1.9 2.0
Excess carrying value of investment over proportionate share of net assets $ 0.0 $ 0.0
[1] Ownership percentage is as of March 31, 2025 and December 31, 2024.