SUPPLEMENTAL CASH FLOW INFORMATION (Schedule of Other Adjustments to Reconcile Net Income to Cash Flow from Operating Activities) (Details) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Amortization of debt issuance costs	$ 2.5	$ 2.5	$ 3.2
Loss on disposal of fixed assets	2.6	0.9	2.1
Other individually immaterial items	(0.3)	(0.3)	(1.0)
Other adjustments, net	$ 4.8	$ 3.1	$ 4.3