REVENUES (Reconciliation of Deferred Revenue Balances) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUES [Abstract]
Balance at beginning of year	$ 178.0	$ 185.3	$ 192.8
Revenue recognized from deferred revenue	(7.9)	(7.3)	(7.5)
Balance at end of year	$ 170.1	$ 178.0	$ 185.3