ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Proceeds from sales and calls of securities and associated gains and losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Proceeds from Sales and Calls of Securities	$ 0.0	$ 0.0	$ 43.2