LEASES (Components of Lease Expense) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
LEASES [Abstract]
Amortization of right-of-use assets		$ 7.1	$ 1.6	$ 0.1
Interest on lease liabilities		0.6	(0.1)	0.0
Operating lease cost		71.0	58.5	56.5
Short-term lease cost	[1]	27.3	30.5	35.4
Variable lease cost		10.6	12.9	13.7
Sublease income		(3.1)	(2.7)	(3.0)
Total lease cost		$ 113.5	$ 100.7	$ 102.7

[1] Our short-term lease cost includes the cost of leases with an initial term of one month or less.