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DERIVATIVE INSTRUMENTS - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | 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 | 5,700,000 | $ (2,600,000) | 3,900,000 | $ 2,200,000 |  |
Gain reclassified into other income | 1,800,000 | 1,900,000 | 5,500,000 | 5,900,000 |  |
Gain expected to be reclassified to earnings in the next twelve months | 6,500,000 |  | 6,500,000 |  |  |
Cross-currency swap | Codman | Other income, net |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gain (loss) recorded to AOCI | 9,700,000 | $ (3,100,000) | 15,400,000 | $ 3,000,000.0 |  |
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 recorded in AOCI, change in fair value | 17,100,000 |  | 26,600,000 |  |  |
Cross-currency swap | Designated as Hedging Instrument | Net Investment Hedges |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Gain reclassified into other income | 2,500,000 |  | 7,200,000 |  |  |
Gain expected to be reclassified to earnings in the next twelve months | 9,600,000 |  | 9,600,000 |  |  |
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 |  |  |

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of foreign currency derivatives and nonderivative instruments designated as fair value hedging instruments which were recognized in earnings, net of offsets by the gain (loss) on the hedged item to the extent that the fair value hedge was determined to be effective. + References No definition available. + Details
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