v3.25.4
Subsequent Events - Additional Information (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Mar. 02, 2026
Feb. 23, 2026
Feb. 02, 2026
Jan. 01, 2026
Nov. 24, 2025
May 06, 2025
Dec. 31, 2022
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jan. 29, 2026
Oct. 24, 2024
Subsequent Event [Line Items]                        
Outstanding letters of credit               $ 8,535,000 $ 4,155,000      
Issuance of shares             0 165,369,775 129,127,517 62,177,994    
Net Long-Term Capital Gains               $ 1,355 $ 5,253      
Internal Revenue Service (IRS)                        
Subsequent Event [Line Items]                        
Percentage of designated distributions from net investment income, Interest-related dividends               88.77%        
Percentage of designated dividends paid from net investment taxable income               97.27%        
Net Long-Term Capital Gains               $ 1,355,282        
Short-term capital gain dividends               1,257,747        
MS Revolving Credit Facility                        
Subsequent Event [Line Items]                        
Outstanding letters of credit               2,000,000 [1] $ 2,000,000 [1]     $ 2,000,000
2031 Notes                        
Subsequent Event [Line Items]                        
Redeemable notes, principal amount         $ 500,000     500,000        
Redeemable notes, interest rate percentage         5.875%              
Debt instrument, Maturity date, Description         The 2031 Notes bear interest at a rate of 5.875% per year, payable semi-annually, commencing on July 31, 2026. The 2031 Notes will mature on January 31, 2031 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the indenture.              
2028 Notes                        
Subsequent Event [Line Items]                        
Redeemable notes, principal amount           $ 400,000   $ 400,000        
Redeemable notes, interest rate percentage           5.875%            
Debt instrument, Maturity date, Description           The 2028 Notes bear interest at a rate of 5.875% per year, payable semi-annually, commencing on November 6, 2025. The 2028 Notes will mature on May 6, 2028 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the indenture.            
Subsequent Events                        
Subsequent Event [Line Items]                        
Proceeds from issuance of Common Shares     $ 35,154 $ 308,843                
Issuance of shares     22,794,095 12,358,659                
Subsequent Events | Class I                        
Subsequent Event [Line Items]                        
Proceeds from issuance of Common Shares $ 161,982                      
Subsequent Events | Class S                        
Subsequent Event [Line Items]                        
Proceeds from issuance of Common Shares 1,999   $ 100                  
Issuance of shares     4,011                  
Subsequent Events | Class D                        
Subsequent Event [Line Items]                        
Proceeds from issuance of Common Shares 300                      
Subsequent Events | Affiliated Entity                        
Subsequent Event [Line Items]                        
Proceeds from issuance of Common Shares $ 46,492   $ 568,257 $ 95,351                
Subsequent Events | MS Revolving Credit Facility | Minimum                        
Subsequent Event [Line Items]                        
Outstanding letters of credit                     $ 2,000,000  
Subsequent Events | MS Revolving Credit Facility | Maximum                        
Subsequent Event [Line Items]                        
Outstanding letters of credit                     $ 2,400,000  
Subsequent Events | 2031 Notes                        
Subsequent Event [Line Items]                        
Redeemable notes, principal amount   $ 400,000                    
Redeemable notes, interest rate percentage   5.875%                    
Subsequent Events | 2028 Notes                        
Subsequent Event [Line Items]                        
Redeemable notes, principal amount   $ 700,000                    
Redeemable notes, interest rate percentage   5.05%                    
Debt instrument, Maturity date, Description   The February 2028 Notes bear interest at the rate of 5.050% per annum, payable semi-annually in arrears on February 23 and August 23 of each year, commencing on August 23, 2026. The February 2028 Notes will mature on February 23, 2028 and may be redeemed in whole or in part at our option at any time or from time to time at the redemption prices set forth in the indenture.In connection with the February 2028 Notes, the Company entered into an interest rate swap to more closely align the interest rates of the Company’s fixed rate liabilities with the investment portfolio, which predominately consists of floating rate loans. The Company designated this interest rate swap and the February 2028 in a qualifying fair value hedging relationship.                    
[1] Provides, under certain circumstances, a total borrowing capacity of $2,000,000. The Company may borrow amounts in USD or certain other permitted currencies. Debt outstanding denominated in currencies other than USD has been converted to USD using the applicable foreign currency exchange rate as of the applicable reporting date. As of December31, 2025, the Company had outstanding borrowings denominated in USD of $989,900, in GBP of GBP 16,050 and in AUD of AUD 272,150. As of December 31, 2024, the Company had outstanding borrowings denominated in USD of $715,000.