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DERIVATIVE INSTRUMENTS - Narrative (Details) | 3 Months Ended |  |  |
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Mar. 31, 2021 USD ($) | Mar. 31, 2021 CHF (SFr) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 21, 2020 USD ($) | Dec. 21, 2020 CHF (SFr) | Oct. 02, 2017 USD ($) | Oct. 02, 2017 CHF (SFr)
Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Total derivatives designated as hedges — Assets | $ 41,433,000 |  |  | $ 12,920,000 |  |  |  |
Gain (loss) recorded in AOCL, change in fair value | 88,285,000 |  | $ (26,847,000) |  |  |  |  |
Cash Flow Hedges | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Current notional amount |  |  |  | 1,875,000,000 |  |  |  |
Foreign Exchange Forward | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Current notional amount |  |  |  | $ 9,700,000 |  |  |  |
Loss on foreign currency derivatives | 200,000 |  |  |  |  |  |  |
Total derivatives designated as hedges — Assets | 200,000 |  |  |  |  |  |  |
Cross-currency swap |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Current notional amount |  |  |  |  | $ 471,600,000 | SFr 420,100,000 |  |
Intercompany loan quarterly payments | SFr |  | SFr 5,800,000 |  |  |  |  |  |
Cross-currency swap | Net Investment Hedges | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Gain (loss) reclassified into other income | 1,700,000 |  | 2,200,000 |  |  |  |  |
Gain expected to be reclassified to earnings in the next twelve months | 5,200,000 |  |  |  |  |  |  |
Gain (loss) recorded, net investment hedge, change in fair value | 11,900,000 |  | 16,700,000 |  |  |  |  |
Cross-currency swap | Codman | Cash Flow Hedges | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Gain (loss) reclassified into other income | 1,300,000 |  | 1,500,000 |  |  |  |  |
Gain (loss) recorded in other income, net | 42,900,000 |  | (1,700,000) |  |  |  |  |
Gain (loss) recorded in AOCL, change in fair value | 40,200,000 |  | $ 5,900,000 |  |  |  |  |
Gain expected to be reclassified to earnings in the next twelve months | $ 9,100,000 |  |  |  |  |  |  |
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

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