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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
Mar. 31, 2012
USD ($)
derivative_instrument
Derivative [Line Items]            
Total exposure to floating rate interest rates 7.00%   7.00%   1.00%  
Foreign Exchange Contract            
Derivative [Line Items]            
Notional amount $ 893,300,000   $ 893,300,000      
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments 35,100,000 $ 2,000,000.0 57,000,000.0 $ (1,100,000)    
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 $ 0 0 $ 6,000,000.0    
Designated as Hedging Instrument | Foreign Exchange Contract            
Derivative [Line Items]            
Notional amount $ 13,100,000   $ 13,100,000