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Investments in Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2022
Marketable Securities [Abstract] |
Schedule of Investments in Marketable Securities | The following table summarizes the cost, gross unrealized gains, gross unrealized losses, and fair value of Investments in marketable securities:
|  |  |  |  |  | December 31, 2021 |  | March 31, 2022
Cost |  |  |  |  |  | $ | 73.2 |  |  | $ | 81.7 |
Unrealized gains |  |  |  |  |  | 8.1 |  |  | 5.6 |
Unrealized losses |  |  |  |  |  | (2.8) |  |  | (6.2) |
Fair value |  |  |  |  |  | $ | 78.5 |  |  | $ | 81.1 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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