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Subsequent Events - Additional Information (Details) - USD ($) | Aug. 07, 2025 | Jul. 31, 2025 | Aug. 04, 2023 | Jul. 21, 2025 | Jul. 01, 2025 | Jun. 30, 2025 | May 08, 2025 | Feb. 27, 2025 | Jun. 30, 2024 | May 01, 2024 | Mar. 18, 2024 | Feb. 29, 2024
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Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Per Share |  |  |  |  |  | $ 0.58 | $ 0.25 | $ 0.25 | $ 0.68 | $ 0.34 |  | $ 0.34
Funding Facility II |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, starting maturity date |  |  | Aug. 04, 2025 |  |  |  |  |  |  |  |  |
Debt instrument, ending maturity date |  |  | Aug. 04, 2027 |  |  |  |  |  |  |  |  |
BlackRock Capital Investment Corporation [Member] | Series 2022A Senior Notes | Unsecured Notes | Tranche A |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  | $ 35,000,000 |
BlackRock Capital Investment Corporation [Member] | Series 2022A Senior Notes | Unsecured Notes | Tranche B |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  | $ 57,000,000 |
Subsequent Event | O 2025 Q3 Dividends |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend payable record date | Sep. 16, 2025 |  |  |  |  |  |  |  |  |  |  |
Amount Per Share | $ 0.25 |  |  |  |  |  |  |  |  |  |  |
Dividend payable date | Sep. 30, 2025 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | S 2025 Q3 Dividends |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend payable record date | Sep. 16, 2025 |  |  |  |  |  |  |  |  |  |  |
Amount Per Share | $ 0.04 |  |  |  |  |  |  |  |  |  |  |
Dividend payable date | Sep. 30, 2025 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Funding Facility II |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, starting maturity date |  | Aug. 04, 2025 |  |  |  |  |  |  |  |  |  |
Debt instrument, ending maturity date |  | Jul. 31, 2027 |  |  |  |  |  |  |  |  |  |
Subsequent Event | HPS Investment Partners |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of interests acquired |  |  |  |  | 100.00% |  |  |  |  |  |  |
Subsequent Event | BlackRock Capital Investment Corporation [Member] | Series 2022A Senior Notes | Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, repayment price, percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |
Subsequent Event | BlackRock Capital Investment Corporation [Member] | Series 2022A Senior Notes | Unsecured Notes | Tranche A |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  | $ 35,000,000 |  |  |  |  |  |  |  |
Repayments of Unsecured Debt |  | $ 35,000,000 |  |  |  |  |  |  |  |  |  |
Subsequent Event | BlackRock Capital Investment Corporation [Member] | Series 2022A Senior Notes | Unsecured Notes | Tranche B |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  | $ 57,000,000 |  |  |  |  |  |  |  |
Repayments of Unsecured Debt |  | $ 57,000,000 |  |  |  |  |  |  |  |  |  |

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