Investments (Tables)

6 Months Ended

Jun. 30, 2022

Schedule Of Investments [Abstract]

Schedule of Fair Value of Cash Equivalents, Long and Short Term Investments

The fair value of the cash equivalents, long-term and short-term investments are disclosed below (amounts in millions).

	June 30, 2022
	Investment Level	Amortized Cost (Carrying Value)			Gross Unrealized Holding Losses			Estimated Fair Value
Commercial bonds and paper	Level 2	$	105.0		$	(1.0	)	$	104.8
Money market funds	Level 1		30.5			—			30.5
U.S. Treasuries	Level 2		46.2			(0.7	)		45.5
Total cash equivalents and investments			181.7			(1.7	)		180.8
Less cash equivalents			(30.5	)		—			(30.5	)
Total Investments		$	151.2		$	(1.7	)	$	150.3

	December 31, 2021
	Investment Level	Amortized Cost (Carrying Value)			Gross Unrealized Holding Losses		Estimated Fair Value
Commercial bonds and paper	Level 2	$	115.2		$	0.2	$	115.0
Money market funds	Level 1		21.3			—		21.3
U.S. Treasuries	Level 2		23.9			0.1		23.8
Total cash equivalents and investments			160.4			0.3		160.1
Less cash equivalents			(23.8	)		—		(23.8	)
Total Investments		$	136.6		$	0.3	$	136.3