Income Taxes - Schedule of Aggregate Unrealized Appreciation of Company investment Federal Income Tax (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income Tax Disclosure [Abstract] | |||
| Aggregate gross unrealized appreciation | $ 107.0 | $ 108.4 | $ 118.3 |
| Aggregate gross unrealized depreciation | 109.4 | 156.5 | 115.9 |
| Net unrealized appreciation (depreciation) over cost for U.S. federal income tax purposes | (2.4) | (48.1) | 2.4 |
| Aggregate cost of securities for U.S. federal income tax purposes (in billions) | $ 4,500.0 | $ 3,700.0 | $ 3,200.0 |
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- References No definition available.
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- Definition Amount of cost of investment for federal income tax purpose. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cumulative increase in investment from unrealized gain when value exceeds cost for federal income tax purpose. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cumulative decrease in investment from unrealized loss when cost for federal income tax purpose exceeds value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cumulative increase (decrease) in investment from unrealized gain (loss) when value exceeds (is less than) cost for federal income tax purpose. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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