Borrowings - Schedule of outstanding borrowing (Details) - USD ($) |
Mar. 31, 2026 |
Dec. 31, 2025 |
Aug. 22, 2025 |
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|---|---|---|---|---|---|---|---|---|---|
| Debt [Member] | |||||||||
| Line of Credit Facility [Line Items] | |||||||||
| Initial principal amount | $ 1,430,000,000 | $ 1,430,000,000 | |||||||
| Long-term debt, Gross | 901,344,332 | 893,353,357 | |||||||
| Carrying Value | 901,344,332 | 893,353,357 | |||||||
| Fidelity Direct Lending Fund I JSPV LLC [Member] | |||||||||
| Line of Credit Facility [Line Items] | |||||||||
| Initial principal amount | 1,000,000,000 | [1] | 1,000,000,000 | [2] | |||||
| Long-term debt, Gross | 650,344,332 | [1] | 680,353,357 | [2] | |||||
| Carrying Value | 650,344,332 | [1] | 680,353,357 | [2] | |||||
| Truist Senior Secured Revolving Credit Facility [Member] | |||||||||
| Line of Credit Facility [Line Items] | |||||||||
| Initial principal amount | 430,000,000 | 430,000,000 | $ 400,000,000 | ||||||
| Long-term debt, Gross | 251,000,000 | 213,000,000 | |||||||
| Carrying Value | $ 251,000,000 | $ 213,000,000 | |||||||
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