v3.26.1
Investments - International Senior Loan Program, LLC (Details)
€ in Millions
3 Months Ended
Jun. 24, 2025
EUR (€)
Sep. 11, 2023
Jun. 30, 2023
USD ($)
Feb. 09, 2021
USD ($)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
May 20, 2024
USD ($)
Dec. 14, 2023
USD ($)
Aug. 31, 2022
USD ($)
May 31, 2022
USD ($)
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Investments sold         $ 2,486,100,000          
Maximum commitment amount             $ 1,500,000,000      
International Senior Loan Program, LLC                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Ownership percentage       70.50%       64.00%    
Investments sold         1,192,700,000          
International Senior Loan Program, LLC | Pantheon                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Ownership percentage       29.50%       36.00%    
International Senior Loan Program, LLC                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Debt capital contribution       $ 317,100,000            
Distribution received       190,200,000            
Subordinated notes         190,700,000 $ 190,700,000        
Equity interests         31,600,000 43,600,000        
Commitments with equity and subordinated note interests         254,300,000 254,300,000        
Capital contributions         254,300,000 254,300,000        
Unfunded capital contributions         0 0        
Debt securities         711,900,000 733,100,000        
Maximum commitment amount     $ 500,000,000 $ 300,000,000            
Spread rate (as a percent)   246.00%                
Equity method investments               $ 5,000,000    
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   us-gaap:SecuredOvernightFinancingRateSofrMember us-gaap:SecuredOvernightFinancingRateSofrMember              
International Senior Loan Program, LLC | Line of Credit [Member]                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Maximum commitment amount         500,000,000          
Spread rate (as a percent)       225.00%            
Outstanding balance         $ 372,500,000 $ 381,400,000        
Effective interest rate         5.10% 5.80%        
International Senior Loan Program, LLC | ISLP Credit Facility                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Maximum commitment amount | € € 375.0                  
Spread rate (as a percent) 195.00%                  
International Senior Loan Program, LLC | ISLP Credit Facility Tranche B                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Maximum commitment amount                 $ 200,000,000 $ 50,000,000
International Senior Loan Program, LLC | Pantheon                    
Investment Company, Nonconsolidated Subsidiary [Line Items]                    
Debt capital contribution       $ 138,300,000            
Equity Capital Contribution       46,100,000            
Joint venture investment       $ 50,000,000            
Commitments with equity and subordinated note interests         $ 149,200,000 $ 149,200,000        
Capital contributions         149,200,000 149,200,000        
Unfunded capital contributions         $ 0 $ 0        
Equity method investments               $ 45,300,000