INVESTMENTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Net gains (loss)	$ 9.6	$ (40.6)	$ 22.9	$ (69.7)