v3.26.1
Subsequent Events - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Aug. 12, 2026
Jul. 22, 2026
Jul. 31, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Aug. 10, 2026
Aug. 09, 2026
Jul. 23, 2026
Dec. 31, 2025
Aug. 08, 2025
Subsequent Event [Line Items]                        
Aggregate principal committed       $ 51,847,405,000   $ 51,847,405,000         $ 41,987,897,000  
Windom Peak Funding Facility | Line of Credit | Revolving Credit Facility                        
Subsequent Event [Line Items]                        
Aggregate principal amount       2,150,000,000   2,150,000,000         $ 2,150,000,000  
CitiBank, Revolving Credit Facility | Line of Credit | Revolving Credit Facility                        
Subsequent Event [Line Items]                        
Aggregate principal amount       5,500,000,000   5,500,000,000            
CitiBank, Revolving Credit Facility | Line of Credit | Secured debt                        
Subsequent Event [Line Items]                        
Aggregate principal amount       405,000,000.0   $ 405,000,000.0            
CitiBank, Revolving Credit Facility, Revolving Commitments 2027 | Line of Credit | Revolving Credit Facility | Scenario 1                        
Subsequent Event [Line Items]                        
Aggregate principal amount                       $ 90,000,000.0
Citi Bank Revolving Credit Facility Revolving Commitments 2028 | Line of Credit | Revolving Credit Facility | Scenario 1                        
Subsequent Event [Line Items]                        
Aggregate principal amount                       $ 90,000,000.0
Subsequent Event                        
Subsequent Event [Line Items]                        
Proceeds from dividend reinvestment plan     $ 280,400,000                  
Distributions reinvested $ 227,100,000                      
Subsequent Event | 2026-1 Lender Finance Facility                        
Subsequent Event [Line Items]                        
Aggregate principal committed                   $ 730,000,000.0    
Subsequent Event | Windom Peak Funding Facility | Line of Credit | Revolving Credit Facility                        
Subsequent Event [Line Items]                        
Additional borrowing capacity     $ 150,000,000.0                  
Subsequent Event | CitiBank, Revolving Credit Facility | Line of Credit                        
Subsequent Event [Line Items]                        
Aggregate principal amount               $ 6,300,000,000 $ 6,000,000,000.0      
Subsequent Event | CitiBank, Revolving Credit Facility | Line of Credit | Revolving Credit Facility                        
Subsequent Event [Line Items]                        
Aggregate principal amount               5,800,000,000        
Subsequent Event | CitiBank, Revolving Credit Facility | Line of Credit | Secured debt                        
Subsequent Event [Line Items]                        
Aggregate principal amount               455,000,000.0        
Subsequent Event | CitiBank, Revolving Credit Facility, Revolving Commitments 2027 | Line of Credit | Revolving Credit Facility | Scenario 1                        
Subsequent Event [Line Items]                        
Aggregate principal amount               90,000,000.0        
Subsequent Event | Citi Bank Revolving Credit Facility Revolving Commitments 2028 | Line of Credit | Revolving Credit Facility | Scenario 1                        
Subsequent Event [Line Items]                        
Aggregate principal amount               90,000,000.0        
Subsequent Event | Citi Bank Revolving Credit Facility Revolving Commitments 2028 | Line of Credit | Revolving Credit Facility | Scenario 2                        
Subsequent Event [Line Items]                        
Aggregate principal amount               100,000,000.0        
Subsequent Event | Citi Bank Revolving Credit Facility Revolving Commitments 2028 | Line of Credit | Secured debt | Scenario 2                        
Subsequent Event [Line Items]                        
Aggregate principal amount               100,000,000.0        
Subsequent Event | CitiBank, Revolving Credit Facility, Revolving Commitments 2029 | Line of Credit | Revolving Credit Facility | Scenario 3                        
Subsequent Event [Line Items]                        
Aggregate principal amount               100,000,000.0        
Subsequent Event | CitiBank, Revolving Credit Facility, Revolving Commitments 2029 | Line of Credit | Secured debt | Scenario 3                        
Subsequent Event [Line Items]                        
Aggregate principal amount               $ 100,000,000.0        
Class I                        
Subsequent Event [Line Items]                        
Declared distribution (in dollars per share)           $ 1.2000 $ 1.3200          
Distributions reinvested       334,638,000 $ 355,663,000 $ 696,023,000 $ 683,840,000          
Class I | Subsequent Event                        
Subsequent Event [Line Items]                        
Declared distribution (in dollars per share)   $ 0.1800                    
Class S                        
Subsequent Event [Line Items]                        
Declared distribution (in dollars per share)           $ 1.0965 $ 1.2124          
Distributions reinvested       161,951,000 171,014,000 $ 332,006,000 $ 330,231,000          
Class S | Subsequent Event                        
Subsequent Event [Line Items]                        
Declared distribution (in dollars per share)   0.1632                    
CLASS D                        
Subsequent Event [Line Items]                        
Declared distribution (in dollars per share)           $ 1.1696 $ 1.2883          
Distributions reinvested       $ 1,400,000 $ 3,431,000 $ 3,188,000 $ 6,567,000          
CLASS D | Subsequent Event                        
Subsequent Event [Line Items]                        
Declared distribution (in dollars per share)   $ 0.1751