FAIR VALUE MEASUREMENTS - UNREALIZED GAIN OR LOSS ON INVESTMENTS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Net unrealized losses included in earnings related to investments held at end of period	$ 1.7	$ 2.5		$ 15.9
Net unrealized gains included in earnings related to investments held at end of period			$ 4.7