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Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2022
Cash, Cash Equivalents And Marketable Securities [Abstract]  
Cash, Cash Equivalents, And Marketable Securities
The following table summarizes the Company’s cash, cash equivalents, and marketable securities and the fair value categorization of the financial instruments measured at fair value on a recurring basis:
As of December 31,
20222021
 (In millions)
Cash $27.0 $25.8 
Time deposits4.1 3.7 
Money market funds (Level 1)178.6 165.6 
Debt securities issued by the U.S. Treasury (Level 1)776.1 1,016.0 
Total$985.8 $1,211.1 
Cash and cash equivalents $373.6 $223.5 
Restricted cash (included in Other long-term assets)5.4 5.3 
Total Cash, cash equivalents, and restricted cash379.0 228.8 
Marketable securities 606.8 982.3 
Total$985.8 $1,211.1