LEASES (Components of Lease Expense) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
LEASES [Abstract]
Depreciation of right-of-use assets		$ 4.3	$ 0.7	$ 8.7	$ 1.3
Interest on lease liabilities		0.4	0.0	0.7	0.1
Operating lease cost		20.9	15.5	43.9	30.8
Short-term lease cost	[1]	10.2	5.3	20.5	10.4
Variable lease cost		2.4	2.8	4.2	5.5
Sublease income		(0.8)	(0.8)	(1.6)	(1.6)
Total lease cost		$ 37.4	$ 23.5	$ 76.4	$ 46.5

[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).