MARKETABLE SECURITIES - Contractual Maturities of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Less than one year	$ 18.5
One to five years	57.6
Six to ten years	41.2
Greater than ten years	90.6
Amortized Cost	207.9	$ 214.5
Fair Value
Less than one year	18.4
One to five years	56.7
Six to ten years	38.0
Greater than ten years	83.0
Fair Value	$ 196.1	$ 219.4

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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