XML 78 R61.htm IDEA: XBRL DOCUMENT v3.25.3
Investments - Schedule of Investments in NGP (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]    
Total $ 2,942.5 $ 3,292.3
Global Private Equity    
Schedule of Equity Method Investments [Line Items]    
Total 1,431.2 1,818.0
Total investments in NGP | Global Private Equity    
Schedule of Equity Method Investments [Line Items]    
Total 642.2 912.0
Investment in NGP Management | Global Private Equity    
Schedule of Equity Method Investments [Line Items]    
Total 256.0 369.2
Investments in NGP general partners - accrued performance allocations | Global Private Equity    
Schedule of Equity Method Investments [Line Items]    
Total 341.2 489.4
Principal investments in NGP funds | Global Private Equity    
Schedule of Equity Method Investments [Line Items]    
Total $ 45.0 $ 53.4