Financial Instruments (Details 1) - USD ($) $ in Millions |
Mar. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Marketable equity securities | ||
| Amortized Cost | $ 928.4 | $ 979.9 |
| Gross Unrealized Gains | 0.0 | 0.0 |
| Gross Unrealized Losses | (598.9) | (563.1) |
| Fair Value | 329.5 | 416.8 |
| Equity Securities, Current | ||
| Marketable equity securities | ||
| Amortized Cost | 11.7 | 31.6 |
| Gross Unrealized Gains | 0.0 | 0.0 |
| Gross Unrealized Losses | (11.0) | (21.0) |
| Fair Value | 0.7 | 10.6 |
| Equity Securities, Non-Current | ||
| Marketable equity securities | ||
| Amortized Cost | 916.7 | 948.3 |
| Gross Unrealized Gains | 0.0 | 0.0 |
| Gross Unrealized Losses | (587.9) | (542.1) |
| Fair Value | $ 328.8 | $ 406.2 |