LEASES (Components of Lease Expense) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
LEASES [Abstract]
Depreciation of right-of-use assets		$ 12.8	$ 16.5	$ 7.1
Interest on lease liabilities		0.9	1.2	0.6
Operating lease cost		77.5	85.6	71.0
Short-term lease cost	[1]	50.4	46.4	27.3
Variable lease cost		23.5	14.4	10.6
Sublease income		(3.4)	(2.9)	(3.1)
Total lease cost		$ 161.7	$ 161.2	$ 113.5

[1] Our short-term lease cost includes the cost of leases with an initial term of one year or less (including those with terms of one month or less).