CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Investments and receivables at fair value | $ 1,930.0 | $ 2,907.7 |
| Class A | ||
| Common stock, nominal value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, issued (in shares) | 174,353,470 | 173,046,371 |
| Common stock, outstanding (in shares) | 174,353,470 | 173,046,371 |
| Class B | ||
| Common stock, nominal value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, issued (in shares) | 12,968,658 | 12,968,658 |
| Common stock, outstanding (in shares) | 12,968,658 | 12,968,658 |
| Class C | ||
| Common stock, nominal value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, issued (in shares) | 155,157,101 | 162,710,787 |
| Common stock, outstanding (in shares) | 155,157,101 | 162,710,787 |