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Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2025
Income Tax Disclosure [Abstract] |
Schedule of Taxable Income And Taxable Net Realized Gains (Losses) | Taxable income and taxable net realized gains (losses) for the three and nine months ended September 30, 2025 and 2024 appears as follows:
(in millions, except per share data) |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 | 2024 |  | 2025 | 2024
Taxable income |  | $ | 85.7 |  | $ | 75.8 |  |  | $ | 230.4 |  | $ | 230.0 |
Taxable income per share |  | $ | 0.47 |  | $ | 0.47 |  |  | $ | 1.31 |  | $ | 1.44 |
Taxable net realized gains (losses) |  | $ | 5.1 |  | $ | 8.7 |  |  | $ | (30.6) |  | $ | 18.1 |
Taxable net realized gains (losses) per share |  | $ | 0.04 |  | $ | 0.05 |  |  | $ | (0.17) |  | $ | 0.11 |
Weighted average shares outstanding |  | 180.4 |  | 161.0 |  |  | 175.6 |  | 159.7 |
Schedule of Aggregate Unrealized Appreciation And Depreciation of Investment Over Federal Income Tax | The aggregate gross unrealized appreciation (depreciation) of the Company’s investment over cost for U.S. federal income tax purposes appears as follows:
(in millions) |  | September 30, 2025 |  | December 31, 2024
Aggregate gross unrealized appreciation |  | $ | 123.1 |  |  | $ | 108.4 |
Aggregate gross unrealized depreciation |  | 108.1 |  |  | 156.5 |
Net unrealized appreciation (depreciation) over cost for U.S. federal income tax purposes |  | 15.0 |  |  | (48.1) |
Aggregate cost of securities for U.S. federal income tax purposes (in billions) |  | 4.3 |  |  | 3.7 |

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