DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018	Mar. 31, 2012 USD ($) derivative_instrument
Derivative [Line Items]
Total exposure to floating rate interest rates	26.00%		1.00%
Foreign Exchange Contract
Derivative [Line Items]
Notional amounts of foreign currency exchange contracts	$ 1,236,200,000
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	25,000,000.0	$ 900,000
March 2012 Interest-Rate Swap Termination
Derivative [Line Items]
Number of interest-rate swap agreements terminated | derivative_instrument				2
Notional amount				$ 350,000,000
Deferred gain (loss) on discontinuation of interest rate fair value hedge				$ 46,100,000
Amortization of interest rate swap gains	0	$ 1,300,000
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Notional amounts of foreign currency exchange contracts	$ 26,800,000