Other Consolidated Financial Statement Detail - (Gains) Losses on Investments, Net (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||
| Net (gains) losses recognized on equity securities | $ 33.3 | $ 3.8 | $ (31.8) | $ 34.1 |
| Less: Net (gains) losses realized on equity securities | 8.2 | 7.0 | 5.0 | 1.6 |
| Net unrealized (gains) losses recognized on equity securities | $ 25.1 | $ (3.2) | $ (36.8) | $ 32.5 |