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Investments (Tables) | 12 Months Ended
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Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Available-for-sale Securities | The following is a summary of the fair values, which were equal to the amortized costs, of the Company's available-for-sale securities, all due in one year or less, as of December 31, 2020 and 2019.
(in millions) | December 31, 2020 |  | December 31, 2019
Corporate Bonds | $ | 4.7 |  |  | $ | — |
Commercial Paper | 51.2 |  |  | — |
U.S. Treasury Bills | 0.8 |  |  | 0.8 |
Total available-for-sale-securities | $ | 56.7 |  |  | $ | 0.8 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- References No definition available. + Details
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