Borrowings - Schedule of outstanding borrowing (Details) - USD ($) |
Sep. 30, 2026 |
Dec. 31, 2025 |
Aug. 22, 2025 |
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| Debt [Member] | |||||||||
| Line of Credit Facility [Line Items] | |||||||||
| Aggregate principal amount | $ 1,300,000,000 | $ 1,430,000,000 | |||||||
| Long-term debt, Gross | 903,327,443 | 893,353,357 | |||||||
| Carrying Value | 903,327,443 | 893,353,357 | |||||||
| Fidelity Direct Lending Fund I JSPV LLC [Member] | |||||||||
| Line of Credit Facility [Line Items] | |||||||||
| Aggregate principal amount | 700,000,000 | [1] | 1,000,000,000 | [2] | |||||
| Long-term debt, Gross | 560,327,443 | [1] | 680,353,357 | [2] | |||||
| Carrying Value | 560,327,443 | [1] | 680,353,357 | [2] | |||||
| Truist Senior Secured Revolving Credit Facility [Member] | |||||||||
| Line of Credit Facility [Line Items] | |||||||||
| Aggregate principal amount | 600,000,000 | 430,000,000 | $ 400,000,000 | ||||||
| Long-term debt, Gross | 343,000,000 | 213,000,000 | |||||||
| Carrying Value | $ 343,000,000 | $ 213,000,000 | |||||||
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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