Investments - Schedule of Investment Portfolio at Cost and Fair Value (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 80,347,851 | $ 82,916,241 | ||||||||||||||
| Fair Value | $ 77,649,107 | $ 82,199,346 | ||||||||||||||
| Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 100.00% | 100.00% | ||||||||||||||
| First lien debt | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 72,789,476 | [1],[2],[3] | $ 73,980,617 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 70,683,268 | [1],[3] | $ 73,345,369 | [4],[6] | ||||||||||||
| First lien debt | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 91.00% | 89.20% | ||||||||||||||
| Second lien debt | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 3,136,291 | [1],[2],[3] | $ 3,296,882 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 2,894,973 | [1],[3] | $ 3,262,537 | [4],[6] | ||||||||||||
| Second lien debt | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 3.70% | 4.00% | ||||||||||||||
| Unsecured debt | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 83,948 | [1],[2],[3] | $ 80,808 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 79,392 | [1],[3] | $ 79,427 | [4],[6] | ||||||||||||
| Unsecured debt | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 0.10% | 0.10% | ||||||||||||||
| Structured finance obligations - debt instruments | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 221,476 | $ 501,804 | ||||||||||||||
| Fair Value | $ 210,320 | $ 501,333 | ||||||||||||||
| Structured finance obligations - debt instruments | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 0.30% | 0.60% | ||||||||||||||
| Structured finance obligations - equity instruments | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 324,820 | $ 331,279 | ||||||||||||||
| Fair Value | $ 263,118 | $ 301,610 | ||||||||||||||
| Structured finance obligations - equity instruments | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 0.40% | 0.40% | ||||||||||||||
| Investments in Joint Ventures | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 1,953,706 | [1],[2],[3] | $ 1,932,706 | [4],[5],[6] | ||||||||||||
| Fair Value | $ 1,660,325 | [1],[3] | $ 1,791,813 | [4],[6] | ||||||||||||
| Investments in Joint Ventures | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 2.10% | 2.20% | ||||||||||||||
| Equity and other | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| Cost | $ 1,838,134 | $ 2,792,145 | ||||||||||||||
| Fair Value | $ 1,857,711 | $ 2,917,257 | ||||||||||||||
| Equity and other | Investments At Fair Value | Investment Type Concentration Risk | ||||||||||||||||
| Schedule of Investments [Line Items] | ||||||||||||||||
| % of Total Investments at Fair Value | 2.40% | 3.50% | ||||||||||||||
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