Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2023

Financial Instruments, Owned, at Fair Value, by Type, Alternative [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:

	September 30,		December 31,
	2023		2022
	(In millions)
Cash	$	22.4	$	27.0
Time deposits	4.3		4.1
Money market funds (Level 1)	136.3		178.6
Debt securities issued by the U.S. Treasury (Level 1)	785.8		776.1
Total	$	948.8	$	985.8
Cash and cash equivalents	$	157.7	$	373.6
Restricted cash (included in Other long-term assets)	5.3		5.4
Total Cash, cash equivalents, and restricted cash	163.0		379.0
Marketable securities	785.8		606.8
Total	$	948.8	$	985.8