Other Consolidated Financial Statement Detail - (Gains) Losses on Investments, Net (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||
| Net (gains) losses recognized on equity securities | $ (42.8) | $ (5.3) | $ (65.1) | $ 30.3 |
| Less: Net (gains) losses realized on equity securities | 0.0 | 0.0 | (3.2) | (5.4) |
| Net unrealized (gains) losses recognized on equity securities | $ (42.8) | $ (5.3) | $ (61.9) | $ 35.7 |