INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended			24 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Income Taxes [Line Items]
Tax Act, Provisional income tax benefit		$ 12.1
Tax Act, Additional net expense related to increase in 2017 transition taxes	$ 4.0
Tax Act, Additional net tax benefits	0.6
Tax Act, Revised total tax benefit				$ 8.7
Tax benefit related to earnings from foreign subsidiaries	3.4
Increase in income tax payable due to repatriation of foreign earnings	14.8
Unrecognized tax benefits and related interest and penalties, all of which would affect our effective tax rate if recognized	38.0			38.0
Expected decrease in unrecognized tax benefits in next twelve months due to lapsing statutes	2.1			2.1
Interest and penalties recognized	1.0	0.7	$ 0.9
Interest and penalties accrued	6.5	6.8		6.5
Foreign net operating loss carryforwards tax effect	8.1	$ 10.9		$ 8.1
Foreign Operating Loss Carryforward
Income Taxes [Line Items]
Decrease in valuation allowance recorded against deferred tax asset	$ 1.7