DEBT - Schedule of Components of Interest Expense (Details) - 1.25% Convertible Senior Notes, Due December 2026 - Convertible Debt - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument, Redemption [Line Items]
Contractual interest	$ 6.3	$ 6.2	$ 18.9	$ 18.9
Amortization of debt discounts and debt issuance costs	1.3	1.4	3.9	3.8
Interest expense	$ 7.6	$ 7.6	$ 22.8	$ 22.7