INCOME TAXES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Excess tax benefit recorded during period	$ 4.2
Tax expense related to enacted statutory rate changes	0.5
Tax benefit for other discrete tax matters	1.5	$ 4.1	$ 0.5
Tax benefit related to impairment of indefinite-lived intangible assets	$ 23.5
Tax benefit from release of valuation allowance			$ 78.6