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MARKETABLE INVESTMENT SECURITIES (Tables)

9 Months Ended

Sep. 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 December 31, 2023 were as follows:

(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

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- Definition

Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

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