XML 63 R41.htm IDEA: XBRL DOCUMENT v3.20.4
Investments (Tables)
12 Months Ended
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, 2020December 31, 2019
Corporate Bonds$4.7 $— 
Commercial Paper51.2 — 
U.S. Treasury Bills0.8 0.8 
Total available-for-sale-securities$56.7 $0.8