INCOME TAXES - Provision for income taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current
United States	$ 7.3	$ (0.5)	$ 0.2
Outside United States	201.6	118.9	206.0
Total current income taxes	208.9	118.4	206.2
Deferred
Outside United States	(54.2)	(13.0)	(95.1)
Total deferred income taxes	(54.2)	(13.0)	(95.1)
Provision for income taxes	$ 154.7	$ 105.4	$ 111.1