FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Recurring Basis
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	$ 3.0	$ 3.0
Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	3.0	3.0
Recurring Basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	0.0	0.0
Recurring Basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	0.0	0.0
Fair value | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Debt	264.0	230.0
Carrying value
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Debt	$ 262.6	$ 226.0