MARKETABLE INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of Fair Value for Available-for-Sale Securities by Major Security Type and Class of Security

The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for debt securities classified as available-for-sale securities by major security type and class of security at June 30, 2024 and December 31, 2023 were as follows:


(in millions)	Amortized cost		Gross unrealized holding gains		Gross unrealized holding losses		Estimated fair value
June 30, 2024
Cash and cash equivalents:
Cash	$	88.3	$	—	$	—	$	88.3
Cash equivalents	6.4		—		—		6.4
Total cash and cash equivalents	94.7		—		—		94.7
Reclassification to assets held for sale	(2.3)		—		—		(2.3)
Total cash and cash equivalents	92.4		—		—		92.4
Available-for-sale:
Corporate bonds and notes	4.3		—		—		4.3
Municipal bonds	0.6		—		—		0.6


Total	$	97.3	$	—	$	—	$	97.3


(in millions)	Amortized cost		Gross unrealized holding gains		Gross unrealized holding losses		Estimated fair value
December 31, 2023
Cash and cash equivalents:
Cash	$	129.9	$	—	$	—	$	129.9
Cash equivalents	2.2		—		—		2.2
Total cash and cash equivalents	132.1		—		—		132.1
Available-for-sale:
Corporate bonds and notes	8.4		—		(0.1)		8.3
Municipal bonds	0.5		—		—		0.5


Total	$	141.0	$	—	$	(0.1)	$	140.9

Schedule of Cash, Cash Equivalents, and Maturities of Debt Securities Classified as Available-For-Sale Securities

Cash, cash equivalents, and maturities of debt securities classified as available-for-sale securities were as follows at June 30, 2024:


(in millions)	Amortized cost		Estimated fair value
Cash	$	88.3	$	88.3
Cash equivalents	6.4		6.4
Available-for-sale:
Due within one year	4.9		4.9


Total	99.6		99.6
Reclassification to assets held for sale	(2.3)		(2.3)
Total cash, cash equivalents, and maturities of debt securities classified as available-for-sale securities	$	97.3	$	97.3