LEASES (Components of Lease Expense) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
LEASES [Abstract]
Depreciation of right-of-use assets		$ 3.3	$ 4.2	$ 10.1	$ 12.9
Interest on lease liabilities		0.2	0.2	0.7	0.9
Operating lease cost		19.1	21.7	58.3	65.6
Short-term lease cost	[1]	14.8	12.3	38.5	32.8
Variable lease cost		4.9	4.7	15.0	8.9
Sublease income		(0.8)	(0.6)	(2.7)	(2.2)
Total lease cost		$ 41.5	$ 42.5	$ 119.9	$ 118.9

[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).