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DERIVATIVE INSTRUMENTS - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Oct. 02, 2017
CHF (SFr)
Oct. 02, 2017
USD ($)
Derivative [Line Items]            
Derivative, notional amount matured $ 150,000,000   $ 150,000,000      
Designated as Hedging Instrument | Cash Flow Hedges            
Derivative [Line Items]            
Current notional amount 1,475,000,000   1,475,000,000      
Cross-currency swap | Codman            
Derivative [Line Items]            
Gain (loss), reclassification from AOCI, foreign currency rate translation, intercompany loan (5,100,000) $ 11,300,000 (1,800,000) $ 4,900,000    
Gain reclassified into other income 1,700,000 2,000,000.0 3,700,000 3,900,000    
Pre-tax income recorded in AOCI related to cash flow hedges to be reclassified to earnings in the next twelve months 6,800,000   6,800,000      
Cross-currency swap | Codman | Other income, net            
Derivative [Line Items]            
Gain (loss) recorded to AOCI (1,700,000) $ 13,000,000.0 5,800,000 $ 6,100,000    
Cross-currency swap | Short | Codman            
Derivative [Line Items]            
Current notional amount           $ 300,000,000.0
Cross-currency swap | Long | Codman            
Derivative [Line Items]            
Current notional amount | SFr         SFr 291,200,000  
Cross-currency swap | Designated as Hedging Instrument            
Derivative [Line Items]            
Gain (loss) recorded in AOCI, change in fair value (800,000)   9,400,000      
Cross-currency swap | Designated as Hedging Instrument | Net Investment Hedges            
Derivative [Line Items]            
Gain reclassified into other income 2,400,000   4,700,000      
Pre-tax income recorded in AOCI related to cash flow hedges to be reclassified to earnings in the next twelve months 9,000,000.0   9,000,000.0      
Cross-currency swap | Designated as Hedging Instrument | Codman | Cash Flow Hedges            
Derivative [Line Items]            
Current notional amount $ 33,300,000   33,300,000      
Loss recorded in other income, net     $ 400,000