XML 72 R57.htm IDEA: XBRL DOCUMENT
v3.10.0.1

DERIVATIVE INSTRUMENTS (Schedule of Interest Rate Swap Derivatives) (Details) - Designated as Hedging Instrument - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Interest Rate Swap |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 1,500,000,000 | $ 1,100,000,000
Cash Flow Hedging |  |
Derivative [Line Items] |  |
Estimated Fair Value | 619,000,000 | 592,000,000
Cash Flow Hedging | Interest Rate Swap |  |
Derivative [Line Items] |  |
Current Notional Amount | 1,475,000,000 | 1,050,000,000
Cash Flow Hedging | 3-Month USD LIBOR | Interest Rate Swap Designated June 22, 2016 Tranche 1 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 50,000,000 | $ 50,000,000
Fixed Interest Rate | 1.062% | 1.062%
Estimated Fair Value | $ 410,000,000 | $ 675,000,000
Cash Flow Hedging | 3-Month USD LIBOR | Interest Rate Swap Designated June 22, 2016 Tranche 2 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 50,000,000 | $ 50,000,000
Fixed Interest Rate | 1.062% | 1.062%
Estimated Fair Value | $ 415,000,000 | $ 672,000,000
Cash Flow Hedging | 3-Month USD LIBOR | Interest Rate Swap Designated February 6, 2017 Tranche 1 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 50,000,000 | $ 50,000,000
Fixed Interest Rate | 1.834% | 1.834%
Estimated Fair Value | $ 619,000,000 | $ 318,000,000
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated July 12, 2016 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 50,000,000 | $ 50,000,000
Fixed Interest Rate | 0.825% | 0.825%
Estimated Fair Value | $ 418,000,000 | $ 779,000,000
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated February 6, 2017 Tranche 2 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 100,000,000 | $ 100,000,000
Fixed Interest Rate | 1.652% | 1.652%
Estimated Fair Value | $ 1,287,000,000 | $ 858,000,000
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated March 27, 2017 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 100,000,000 | $ 100,000,000
Fixed Interest Rate | 1.971% | 1.971%
Estimated Fair Value | $ 1,246,000,000 | $ 337,000,000
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 13, 2017 Tranche 1 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 150,000,000 | $ 150,000,000
Fixed Interest Rate | 2.201% | 2.201%
Estimated Fair Value | $ 1,491,000,000 | $ (455,000,000)
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 13, 2017 Tranche 2 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 150,000,000 | $ 150,000,000
Fixed Interest Rate | 2.201% | 2.201%
Estimated Fair Value | $ 1,460,000,000 | $ (434,000,000)
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 13, 2017 Tranche 3 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 100,000,000 | $ 100,000,000
Fixed Interest Rate | 2.423% | 2.423%
Estimated Fair Value | $ 418,000,000 | $ (684,000,000)
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 13, 2017 Tranche 4 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 50,000,000 | $ 50,000,000
Fixed Interest Rate | 2.423% | 2.423%
Estimated Fair Value | $ 162,000,000 | $ (255,000,000)
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 13, 2017 Tranche 5 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 200,000,000 | $ 200,000,000
Fixed Interest Rate | 2.313% | 2.313%
Estimated Fair Value | $ 2,076,000,000 | $ (1,219,000,000)
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated October 10, 2018 Tranche 1 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 75,000,000 |
Fixed Interest Rate | 3.22% |
Estimated Fair Value | $ (2,594,000,000) |
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated October 10, 2018 Tranche 2 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 75,000,000 |
Fixed Interest Rate | 3.199% |
Estimated Fair Value | $ (2,551,000,000) |
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated October 10, 2018 Tranche 3 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 75,000,000 |
Fixed Interest Rate | 3.209% |
Estimated Fair Value | $ (2,568,000,000) |
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 18, 2018 Tranche 1 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 100,000,000 |
Fixed Interest Rate | 2.885% |
Estimated Fair Value | $ (797,000,000) |
Cash Flow Hedging | 1-Month USD LIBOR | Interest Rate Swap Designated December 18, 2018 Tranche 2 |  |
Derivative [Line Items] |  |
Current Notional Amount | $ 100,000,000 |
Fixed Interest Rate | 2.867% |
Estimated Fair Value | $ (873,000,000) |

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=iart_ThreeMonthUSDLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedJune222016Tranche1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedJune222016Tranche2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedFebruary62017Tranche1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=iart_OneMonthUSDLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedJuly122016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedFebruary62017Tranche2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedMarch272017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember132017Tranche1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember132017Tranche2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember132017Tranche3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember132017Tranche4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember132017Tranche5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedOctober102018Tranche1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedOctober102018Tranche2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedOctober102018Tranche3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember182018Tranche1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=iart_InterestRateSwapDesignatedDecember182018Tranche2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |