v3.26.1
Investments - Schedule of Composition of Investment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Cost $ 25,642,943 $ 24,414,425
Total Investments before Cash Equivalents, Fair Value 25,367,235 24,515,628
Total Cash Equivalents, Cost 407,895 227,502
Total Cash Equivalents, Fair Value 407,895 227,502
Total Investments after Cash Equivalents, Cost 26,050,838 24,641,927
Total Investments after Cash Equivalents, Fair Value 25,775,130 24,743,130
Total Assets and Liabilities at Fair Value, Cost 26,050,838 24,641,927
Total Assets and Liabilities at Fair Value 25,834,564 24,780,146
Level 1    
Schedule of Investments [Line Items]    
Total Cash Equivalents, Fair Value 407,895 227,502
Total Investments after Cash Equivalents, Fair Value 407,895 227,502
Total Assets and Liabilities at Fair Value 407,895 227,502
Level 2    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 5,185,405 5,858,771
Total Investments after Cash Equivalents, Fair Value 5,185,405 5,858,771
Total Assets and Liabilities at Fair Value 5,244,839 5,895,787
Level 3    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 20,181,830 18,656,857
Total Investments after Cash Equivalents, Fair Value 20,181,830 18,656,857
Total Assets and Liabilities at Fair Value 20,181,830 18,656,857
Money Market Fund    
Schedule of Investments [Line Items]    
Total Cash Equivalents, Cost 407,895 227,502
Total Cash Equivalents, Fair Value 407,895 227,502
Money Market Fund | Level 1    
Schedule of Investments [Line Items]    
Total Cash Equivalents, Fair Value 407,895 227,502
First Lien Secured Debt    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Cost 25,528,593 24,310,842
Total Investments before Cash Equivalents, Fair Value 25,259,847 24,441,482
First Lien Secured Debt | Level 2    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 5,170,893 5,843,088
First Lien Secured Debt | Level 3    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 20,088,954 18,598,394
Second Lien Secured Debt    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Cost   33,700
Total Investments before Cash Equivalents, Fair Value   5,235
Second Lien Secured Debt | Level 2    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value   5,235
Unsecured Debt    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Cost 29,762 45,544
Total Investments before Cash Equivalents, Fair Value 29,250 45,525
Unsecured Debt | Level 2    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 14,310 10,448
Unsecured Debt | Level 3    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 14,940 35,077
Common Equity/Interests    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Cost 75,244 18,084
Total Investments before Cash Equivalents, Fair Value 69,156 15,993
Common Equity/Interests | Level 2    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 202  
Common Equity/Interests | Level 3    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 68,954 15,993
Preferred Equity    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Cost 9,344 6,255
Total Investments before Cash Equivalents, Fair Value 8,982 7,393
Preferred Equity | Level 3    
Schedule of Investments [Line Items]    
Total Investments before Cash Equivalents, Fair Value 8,982 7,393
Currency Swaps    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value   7,947
Currency Swaps | Level 2    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value   7,947
Interest Rate Swaps    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value (31,364) 56,888
Interest Rate Swaps | Level 2    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value (31,364) 56,888
Options (Swaptions and Binary Options)    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value 2,207  
Options (Swaptions and Binary Options) | Level 2    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value 2,207  
Foreign Exchange Forward Transactions    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value 88,591 (27,819)
Foreign Exchange Forward Transactions | Level 2    
Schedule of Investments [Line Items]    
Total Assets and Liabilities at Fair Value $ 88,591 $ (27,819)