Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2024

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:

	March 31,		December 31,
	2024		2023
	(In millions)
Cash	$	23.6	$	25.6
Time deposits	1.9		1.0
Money market funds (Level 1)	202.5		160.3
Debt securities issued by the U.S. Treasury (Level 1)	702.1		744.9
Total	$	930.1	$	931.8
Cash and cash equivalents	$	731.8	$	240.1
Restricted cash (included in Other long-term assets)	5.4		5.4
Total Cash, cash equivalents, and restricted cash	737.2		245.5
Marketable securities	192.9		686.3
Total	$	930.1	$	931.8