LEASES (Components of Lease Expense) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
LEASES [Abstract]
Amortization of right-of-use assets		$ 4.4	$ 0.6
Interest on lease liabilities		0.3	0.0
Operating lease cost		23.0	15.3
Short-term lease cost	[1]	10.3	5.1
Variable lease cost		1.8	2.7
Sublease income		(0.8)	(0.8)
Total lease cost		$ 39.0	$ 22.9

[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).