MARKETABLE SECURITIES - Contractual Maturities of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Less than one year	$ 24.7
One to five years	33.7
Six to ten years	41.0
Greater than ten years	77.5
Amortized Cost	176.9	$ 169.5
Fair Value
Less than one year	24.7
One to five years	33.9
Six to ten years	41.2
Greater than ten years	73.1
Fair Value	$ 172.9	$ 164.3

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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