Investments - Investments in Unconsolidated Entities (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Other long-term investments | $ 320.1 | $ 316.5 |
| Equity method eligible unconsolidated entities, using the fair value option | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Other long-term investments | 66.3 | 66.6 |
| Equity method investments | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Other long-term investments | 29.8 | 26.1 |
| Other unconsolidated investments, at fair value | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Other long-term investments | 185.0 | 185.2 |
| Other unconsolidated investments, at cost | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Other long-term investments | $ 39.0 | $ 38.6 |