RESTRUCTURING - Rollforward of Restructuring Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring Reserve [Roll Forward]
Balance as of beginning of period	$ 7.1	$ 34.8
Accrued charges	29.7	13.9
Payments	(36.8)	(41.6)
Balance as of end of period	0.0	7.1
Cumulative non-cash charges	89.1	74.5
Cumulative charges incurred	$ 304.8	$ 260.5