INCOME TAXES - Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S.:
Federal	$ 7.9	$ 0.6	$ (3.9)
State and local	2.7	1.8	2.9
Foreign	72.3	68.3	96.0
Total current	82.9	70.7	95.0
U.S.:
Federal	(57.2)	17.5	(1.8)
State and local	(0.6)	8.3	(30.3)
Foreign	(12.1)	(10.7)	(14.6)
Total deferred	(69.9)	15.1	(46.7)
Income tax expense	$ 13.0	$ 85.8	$ 48.3