DERIVATIVE INSTRUMENTS - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Oct. 02, 2017 CHF (SFr)	Oct. 02, 2017 USD ($)
Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) recorded in AOCI, change in fair value	$ (14,853,000)	$ (27,679,000)	$ (41,695,000)	$ (25,874,000)
Cash Flow Hedges | Designated as Hedging Instrument
Derivative [Line Items]
Current notional amount	1,175,000,000		1,175,000,000		$ 1,325,000,000
Cross-currency swap | Net Investment Hedges | Designated as Hedging Instrument
Derivative [Line Items]
Gain reclassified into other income	2,200,000	2,400,000	4,400,000	4,700,000
Gain expected to be reclassified to earnings in the next twelve months	8,200,000		8,200,000
Gain (loss) recorded in AOCL, net investment hedge, change in fair value	(2,500,000)	(800,000)	16,400,000	9,400,000
Codman | Cross-currency swap | Cash Flow Hedges | Designated as Hedging Instrument
Derivative [Line Items]
Loss recorded in other income, net	3,400,000	5,100,000	5,100,000	1,800,000
Gain (loss) recorded in AOCI, change in fair value	(2,300,000)	(1,700,000)	3,600,000	5,800,000
Gain reclassified into other income	1,500,000	$ 1,700,000	3,000,000.0	$ 3,700,000
Gain expected to be reclassified to earnings in the next twelve months	$ 5,000,000.0		$ 5,000,000.0
Codman | Cross-currency swap | Short
Derivative [Line Items]
Current notional amount							$ 300,000,000.0
Codman | Cross-currency swap | Long
Derivative [Line Items]
Current notional amount | SFr						SFr 291,200,000