FINANCIAL INSTRUMENTS - Effects of Derivative Financial Instruments, Other Comprehensive Income (Loss) and Net Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Revaluation of derivative financial instruments, net of reclassifications into earnings, tax expense (benefit)	$ 0.3	$ 0.3	$ 0.5	$ 0.7
Interest rate swap | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income	0.1	0.6	0.7		$ 1.2
Interest rate swap | Designated as Hedging Instrument [Member] | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in net income	(0.4)	(1.0)	(1.2)	(2.0)
Interest rate swap | Derivatives not designated as hedging instruments | Miscellaneous, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in net income	0.0	(0.3)	0.2	(0.1)
Foreign exchange contracts | Derivatives not designated as hedging instruments | Foreign currency gain (loss), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in net income	$ 0.1	$ (1.2)	$ 0.2	$ (1.6)