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DERIVATIVE INSTRUMENTS - Narrative (Details) | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) | Oct. 10, 2018 USD ($) | Oct. 01, 2018 USD ($) | Dec. 31, 2017 USD ($) | Nov. 28, 2017 USD ($) | Oct. 02, 2017 CHF (SFr) | Oct. 02, 2017 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |
Pre-tax income recorded in AOCI related to cash flow hedges to be reclassified to earnings in the next twelve months | $ 14,300,000 | $ 14,300,000 |  |  |  |  |  |
Designated as Hedging Instrument | Cash Flow Hedging |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount | 1,050,000,000 | 1,050,000,000 |  |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount | 1,050,000,000 | 1,050,000,000 |  |  | $ 1,050,000,000 |  |  |
Interest Rate Swap | Designated as Hedging Instrument | Cash Flow Hedging | Subsequent Event |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount |  |  | $ 225,000,000.0 |  |  |  |  |
Foreign Exchange Forward | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 8,900,000.0 |  |
Loss from the change in fair value | 200,000 | 200,000 |  |  |  |  |  |
Cross-currency swap | Codman |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Gain (loss), reclassification from AOCI, foreign currency rate translation, intercompany loan | (2,600,000) | 2,200,000 |  |  |  |  |  |
Gain reclassified into income | 1,900,000 | 5,900,000 |  |  |  |  |  |
Pre-tax income recorded in AOCI related to cash flow hedges to be reclassified to earnings in the next twelve months | 7,600,000 | 7,600,000 |  |  |  |  |  |
Cross-currency swap | Codman | Other income (expense) |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Gain (loss) recorded to AOCI | $ (3,100,000) | $ 3,000,000 |  |  |  |  |  |
Cross-currency swap | Short | Codman |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  | $ 300,000,000.0
Cross-currency swap | Long | Codman |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount | SFr |  |  |  |  |  |  | SFr 291,200,000.0 |
Cross-currency swap | Designated as Hedging Instrument | Net Investment Hedging | Subsequent Event |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Notional amount |  |  |  | $ 354,500,000.0 |  |  |  |

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