v3.25.4
Fair Value Measurement - Summary of Assets Categorized Within Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value $ 15,674,510 [1] $ 7,273,815
Debt investments, Fair Value 15,950,297 7,718,533
Unrealized appreciation on derivatives 2,044  
Credit investments, Fair Value (2,075)  
Unrealized depreciation on derivatives (2,075)  
1st Lien/Senior Secured Debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 15,033,160 7,006,800
1st Lien/Last-Out Unitranche    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 297,348 261,643
2nd Lien/Senior Secured Debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 110,097  
Structured Finance Obligation - Debt Instruments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 172,100  
Structured Finance Obligation - Equity Instruments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 54,401  
Preferred Stock    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 2,093  
Common Stock    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 5,282 5,372
Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 29  
Investments in Affiliated Money Market Fund    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 273,743 444,718
Level 1    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 273,743 444,718
Level 1 | Investments in Affiliated Money Market Fund    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 273,743 444,718
Level 2    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 3,529,940 1,875,466
Unrealized appreciation on derivatives 2,044  
Credit investments, Fair Value (2,075)  
Unrealized depreciation on derivatives (2,075)  
Level 2 | 1st Lien/Senior Secured Debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 3,228,090 1,875,466
Level 2 | 2nd Lien/Senior Secured Debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 73,305  
Level 2 | Structured Finance Obligation - Debt Instruments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 172,100  
Level 2 | Structured Finance Obligation - Equity Instruments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 54,401  
Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 12,146,614 5,398,349
Level 3 | 1st Lien/Senior Secured Debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 11,805,070 5,131,334
Level 3 | 1st Lien/Last-Out Unitranche    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 297,348 261,643
Level 3 | 2nd Lien/Senior Secured Debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 36,792  
Level 3 | Preferred Stock    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 2,093  
Level 3 | Common Stock    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value 5,282 $ 5,372
Level 3 | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Business acquisition, investment owned fair value $ 29  
[1] For Industry subtotal and percentage, see Note 4 “Investments.”