INCOME TAXES Deferred Tax Liability Not Recognized (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Asset (Liability) [Line Items]
Unrecognized tax benefits including penalties and interest	$ 1.8	$ 1.0	$ 26.0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 1.8	$ 1.0	$ 3.2