INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Contingency [Line Items]
Liability for uncertain tax positions	$ 31.3		$ 30.4
Liability for uncertain tax positions - current	2.5		2.5
Liability for uncertain positions expected to be resolved in next fiscal year	2.5
Interest and penalties uncertain tax positions recognized	0.2	$ 0.3
Benefit on reversal of interest and penalties	0.0
Accrued interest and penalties uncertain tax positions	$ 3.4		$ 3.2
Federal statutory income tax rate	21.00%		35.00%
One-time transition tax	$ 18.1
Maximum [Member]
Income Tax Contingency [Line Items]
Benefit on reversal of interest and penalties		$ (0.1)