Marketable Securities

3 Months Ended

Mar. 31, 2023

Investments Debt And Equity Securities [Abstract]

Marketable Securities

Note 5 – Marketable securities:

			Cost or
			amortized		Unrealized
	Market value		cost		loss, net
	(In millions)
December 31, 2022:
Current assets	$	75.1	$	75.7	$	(.6)
Noncurrent assets	$	1.2	$	1.2	$	—
March 31, 2023:
Current assets	$	101.0	$	101.5	$	(.5)
Noncurrent assets	$	1.6	$	1.6	$	—

Our marketable securities are primarily invested in U.S. government treasuries which are carried at fair value using Level 2 inputs. The fair value of our marketable securities are either determined using Level 1 inputs (because the securities are actively traded)

or determined using Level 2 inputs (because although these securities are traded, in many cases the market is not active and the period-end valuation is generally based on the last trade of the period, which may be several days prior to the end of the period).