XML 88 R74.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Summary of Long-Term Debt Outstanding (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Mar. 31, 2016
4.61% July 2003 Senior Notes Due Fiscal 2016 |
Debt [Line Items] |
Debt instrument interest rate | 4.61%
Debt Instrument Maturity Period | 2016
3.28% September 2010 Senior Notes Due Fiscal 2016 |
Debt [Line Items] |
Debt instrument interest rate | 3.28%
Debt Instrument Maturity Period | 2016
3.90% September 2010 Senior Notes Due Fiscal 2018 |
Debt [Line Items] |
Debt instrument interest rate | 3.90%
Debt Instrument Maturity Period | 2018
3.95% September 2010 Senior Notes Due Fiscal 2018 |
Debt [Line Items] |
Debt instrument interest rate | 3.95%
Debt Instrument Maturity Period | 2018
4.12% September 2010 Senior Notes Due Fiscal 2019 |
Debt [Line Items] |
Debt instrument interest rate | 4.12%
Debt Instrument Maturity Period | 2019
4.17% September 2010 Senior Notes Due Fiscal 2019 |
Debt [Line Items] |
Debt instrument interest rate | 4.17%
Debt Instrument Maturity Period | 2019
4.33% September 2010 Senior Notes Due Fiscal 2020 |
Debt [Line Items] |
Debt instrument interest rate | 4.33%
Debt Instrument Maturity Period | 2020
4.51% September 2010 Senior Notes Due Fiscal 2021 |
Debt [Line Items] |
Debt instrument interest rate | 4.51%
Debt Instrument Maturity Period | 2021
4.56% September 2010 Senior Notes Due Fiscal 2021 |
Debt [Line Items] |
Debt instrument interest rate | 4.56%
Debt Instrument Maturity Period | 2021
4.61% September 2010 Senior Notes Due Fiscal 2023 |
Debt [Line Items] |
Debt instrument interest rate | 4.61%
Debt Instrument Maturity Period | 2023
4.06% August 2011 Senior Notes Due Fiscal 2019 |
Debt [Line Items] |
Debt instrument interest rate | 4.06%
Debt Instrument Maturity Period | 2019
4.54% August 2011 Senior Notes Due Fiscal 2022 |
Debt [Line Items] |
Debt instrument interest rate | 4.54%
Debt Instrument Maturity Period | 2022
4.64% August 2011 Senior Notes Due Fiscal 2022 |
Debt [Line Items] |
Debt instrument interest rate | 4.64%
Debt Instrument Maturity Period | 2022
4.26% September 2013 senior notes due fiscal 2021 |
Debt [Line Items] |
Debt instrument interest rate | 4.26%
Debt Instrument Maturity Period | 2021
5.01% September 2013 senior notes due fiscal 2024 |
Debt [Line Items] |
Debt instrument interest rate | 5.01%
Debt Instrument Maturity Period | 2024
5.16% September 2013 senior notes due fiscal 2026 |
Debt [Line Items] |
Debt instrument interest rate | 5.16%
Debt Instrument Maturity Period | 2026
Norwegian Kroner Denominated Notes Due Fiscal Two Thousand Twenty Five |
Debt [Line Items] |
Debt Instrument Maturity Period | 2025
Norwegian Kroner Denominated Notes Due Fiscal Two Thousand Twenty Six |
Debt [Line Items] |
Debt Instrument Maturity Period | 2026
Norwegian Kroner Denominated Borrowing Agreement Due Fiscal Two Thousand Sixteen |
Debt [Line Items] |
Debt Instrument Maturity Period | 2016
Norwegian Kroner Denominated Borrowing Agreement Due Fiscal Two Thousand Nineteen |
Debt [Line Items] |
Debt Instrument Maturity Period | 2019
United States Dollar Denominated Borrowing Agreement Due Fiscal Two Thousand Twenty Seven |
Debt [Line Items] |
Debt Instrument Maturity Period | 2027
United States Dollar Denominated Borrowing Agreement Due Fiscal Two Thousand Twenty Eight |
Debt [Line Items] |
Debt Instrument Maturity Period | 2028
Term Loan Facility Due Twenty Twenty |
Debt [Line Items] |
Debt Instrument Maturity Period | 2020
Revolving Line Of Credit Due Fiscal Twenty Twenty |
Debt [Line Items] |
Debt Instrument Maturity Period | 2020

X
- Definition Debt instrument maturity date description. + References No definition available. + Details
Name: | tdw_DebtInstrumentMaturityDateDescriptions
Namespace Prefix: | tdw_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointSixOnePercentJulyTwoThousandThreeSeniorNotesDueFiscalTwoThousandSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_ThreePointTwoEightPercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_ThreePointNineZeroPercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandEighteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_ThreePointNineFivePercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandEighteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointOneTwoPercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointOneSevenPercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointThreeThreePercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointFiveOnePercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointFiveSixPercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointSixOnePercentSeptemberTwoThousandTenSeniorNotesDueFiscalTwoThousandTwentyThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointZeroSixPercentAugustTwoThousandElevenSeniorNotesDueFiscalTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointFiveFourPercentAugustTwoThousandElevenSeniorNotesDueFiscalTwoThousandTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointSixFourPercentAugustTwoThousandElevenSeniorNotesDueFiscalTwoThousandTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FourPointTwoSixPercentSeptemberTwentyThirteenSeniorNotesDueFiscalTwentyTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FivePointZeroOnePercentSeptemberTwentyThirteenSeniorNotesDueFiscalTwentyTwentyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_FivePointOneSixPercentSeptemberTwentyThirteenSeniorNotesDueFiscalTwentyTwentySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_NorwegianKronerDenominatedNotesDueFiscalTwoThousandTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_NorwegianKronerDenominatedNotesDueFiscalTwoThousandTwentySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_NorwegianKronerDenominatedBorrowingAgreementDueFiscalTwoThousandSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_NorwegianKronerDenominatedBorrowingAgreementDueFiscalTwoThousandNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_UnitedStatesDollarDenominatedBorrowingAgreementDueFiscalTwoThousandTwentySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_UnitedStatesDollarDenominatedBorrowingAgreementDueFiscalTwoThousandTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_TermLoanFacilityDueTwentyTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=tdw_RevolvingLineOfCreditDueFiscalTwentyTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |