INCOME TAXES - Summary of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense (benefit):
Domestic	$ 49.0	$ (25.8)	$ 24.8
International	52.3	32.7	21.9
Total current income tax expense	101.3	6.9	46.7
Deferred income tax (benefit) expense:
Domestic	(31.5)	17.2	(12.5)
International	4.2	(18.9)	(0.5)
Total deferred income tax benefit	(27.3)	(1.7)	(13.0)
Total income tax expense	$ 74.0	$ 5.2	$ 33.7