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Investments (Tables) | 3 Months Ended
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Mar. 31, 2022
Schedule Of Investments [Abstract] |
Schedule of Fair Value of Cash Equivalents, Long and Short Term Investments | The fair value of the cash equivalents, long- and short-term investments are disclosed below (amounts in millions).
|  | March 31, 2022 |
|  | Investment Level |  | Amortized Cost (Carrying Value) |  |  | Gross Unrealized Holding Losses |  |  | Estimated Fair Value |
Commercial bonds and paper |  | Level 2 |  | $ | 119.5 |  |  | $ | 0.8 |  |  | $ | 118.8 |
Money market funds |  | Level 1 |  |  | 50.7 |  |  |  | — |  |  |  | 50.7 |
U.S. Treasuries |  | Level 2 |  |  | 49.3 |  |  |  | 0.5 |  |  |  | 48.8 |
Total cash equivalents and investments |  |  |  | $ | 219.5 |  |  | $ | 1.3 |  |  | $ | 218.3 |
Less cash equivalents |  |  |  |  | (53.8 | ) |  |  | — |  |  |  | (53.8 | )
Total Investments |  |  |  | $ | 165.7 |  |  | $ | 1.3 |  |  | $ | 164.5 |
|  | December 31, 2021 |
|  | Investment Level |  | Amortized Cost (Carrying Value) |  |  | Gross Unrealized Holding Losses |  |  | Estimated Fair Value |
Commercial bonds and paper |  | Level 2 |  | $ | 115.2 |  |  | $ | 0.2 |  |  | $ | 115.0 |
Money market funds |  | Level 1 |  |  | 21.3 |  |  |  | — |  |  |  | 21.3 |
U.S. Treasuries |  | Level 2 |  |  | 23.9 |  |  |  | 0.1 |  |  |  | 23.8 |
Total cash equivalents and investments |  |  |  | $ | 160.4 |  |  | $ | 0.3 |  |  | $ | 160.1 |
Less cash equivalents |  |  |  |  | (23.8 | ) |  |  | — |  |  |  | (23.8 | )
Total Investments |  |  |  | $ | 136.6 |  |  | $ | 0.3 |  |  | $ | 136.3 |

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- Definition Schedule of fair value of cash equivalents long and short term investments. + References No definition available. + Details
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- References No definition available. + Details
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