Investments - Investment Portfolio at Cost and Fair Value (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | ||||||||||||||
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Jun. 30, 2026 |
Dec. 31, 2025 |
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| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 13,856,590 | $ 14,387,967 | ||||||||||||||
| Fair Value | $ 13,364,295 | $ 14,207,294 | ||||||||||||||
| Investment Owned, At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Concentration Risk, Percentage | 100.00% | 100.00% | ||||||||||||||
| First lien debt | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 13,441,436 | [1],[2],[3] | $ 14,066,122 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 12,944,578 | [1],[3] | $ 13,866,434 | [4],[6] | ||||||||||||
| First lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Concentration Risk, Percentage | 96.80% | 97.60% | ||||||||||||||
| Second lien debt | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 255,801 | [1],[2],[3] | $ 232,448 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 250,182 | [1],[3] | $ 231,650 | [4],[6] | ||||||||||||
| Second lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Concentration Risk, Percentage | 1.90% | 1.60% | ||||||||||||||
| Unsecured debt | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 14,495 | [1],[2],[3] | $ 13,049 | |||||||||||||
| Fair Value | $ 12,348 | [1],[3] | $ 12,278 | |||||||||||||
| Unsecured debt | Investment Owned, At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Concentration Risk, Percentage | 0.10% | 0.10% | ||||||||||||||
| Equity | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 144,858 | [1],[2],[3] | $ 76,348 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 157,187 | [1],[3] | $ 96,932 | [4],[6] | ||||||||||||
| Equity | Investment Owned, At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Concentration Risk, Percentage | 1.20% | 0.70% | ||||||||||||||
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Cost of the investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value of investment in security owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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