DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017	Mar. 31, 2012 USD ($) derivative_instrument
Derivative [Line Items]
Total exposure to floating rate interest rates	14.00%		1.00%
Foreign Exchange Contract
Derivative [Line Items]
Notional amounts of foreign currency exchange contracts	$ 83.0
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	0.9	$ 0.5
Intercompany Loans
Derivative [Line Items]
Gain (loss) due to the effect of foreign currency exchange rates on intercompany loans	(1.3)	(1.2)
March 2012 Interest-Rate Swap Termination
Derivative [Line Items]
Number of interest-rate swap agreements terminated | derivative_instrument				2
Notional amount				$ 350.0
Deferred gain (loss) on discontinuation of interest rate fair value hedge	4.7			$ 46.1
Amortization of interest rate swap gains	$ 1.3	$ 1.2