v3.26.1
Unconsolidated Affiliates - Schedule of Investments in Unconsolidated Affiliates (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Carrying Value $ 295.3 $ 307.7
Excess carrying value of investment over proportionate share of net assets $ 99.8 103.0
Orbit Private Investments Limited Partners    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 9.80%  
Carrying Value $ 190.5 202.9
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 $ 42.9 41.4
Excess carrying value of investment over proportionate share of net assets $ 23.0 24.6
Broadway Square Partners, LLP    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 50.00%  
Carrying Value $ 50.3 51.2
Excess carrying value of investment over proportionate share of net assets $ 27.4 27.8
Pershing Road Development Company, LLC    
Schedule of Investments [Line Items]    
Ownership Percentage [1] 50.00%  
Carrying Value $ 10.5 10.3
Excess carrying value of investment over proportionate share of net assets 49.4 50.6
Other Unconsolidated Affiliates    
Schedule of Investments [Line Items]    
Carrying Value 1.1 1.9
Excess carrying value of investment over proportionate share of net assets $ 0.0 $ 0.0
[1] Ownership percentage is as of June 30, 2026 and December 31, 2025.