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Commitment and Contingencies (Aribitral Award for the Taking of the Company's Venezuelan Operations) - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 1 Months Ended | 12 Months Ended
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Feb. 08, 2013 Vessel | May 31, 2009 Vessel | Jul. 31, 2009 Vessel | Mar. 31, 2015
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Number of vessels seized | 15 tdw_NumberOfVesselSeized |  |  |
Venezuelan National Oil Company |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Number of vessels seized |  | 11 tdw_NumberOfVesselSeized / tdw_PossessingCompanyAxis = tdw_VenezuelanNationalOilCompanyMember |  |
Petrosucre S |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Number of vessels seized |  |  | 4 tdw_NumberOfVesselSeized / tdw_PossessingCompanyAxis = tdw_PetrosucreSMember |
Compensation for expropriation of the investments of subsidiaries | VENEZUELA |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Compensation awarded to the subsidiaries, annual compound interest rate |  |  |  | 4.50%tdw_LitigationSettlementInterestPercentageOfInterest / us-gaap_LitigationStatusAxis = tdw_CompensatoryPurposesMember / us-gaap_StatementGeographicalAxis = country_VE
Compensation for expropriation of the investments of subsidiaries | VENEZUELA | Fair market value of the Company's principal of the subsidiary |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Compensation awarded to the subsidiaries |  |  |  | 46.4 us-gaap_LitigationSettlementAmount / us-gaap_GainContingenciesByNatureAxis = tdw_PrincipalInvestmentsMember / us-gaap_LitigationStatusAxis = tdw_CompensatoryPurposesMember / us-gaap_StatementGeographicalAxis = country_VE
Compensation for expropriation of the investments of subsidiaries | VENEZUELA | Portion of compounded interest to date |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Compensation awarded to the subsidiaries |  |  |  | 13.9 us-gaap_LitigationSettlementAmount / us-gaap_GainContingenciesByNatureAxis = tdw_NetInterestSettlementsMember / us-gaap_LitigationStatusAxis = tdw_CompensatoryPurposesMember / us-gaap_StatementGeographicalAxis = country_VE
Compensation for expropriation of the investments of subsidiaries | VENEZUELA | Reimbursement of legal and other costs expended |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Compensation awarded to the subsidiaries |  |  |  | 2.5 us-gaap_LitigationSettlementAmount / us-gaap_GainContingenciesByNatureAxis = tdw_LegalAndOtherSettlementsMember / us-gaap_LitigationStatusAxis = tdw_CompensatoryPurposesMember / us-gaap_StatementGeographicalAxis = country_VE
Compensation for expropriation of the investments of subsidiaries | VENEZUELA | Minimum |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Compensation awarded to the subsidiaries |  |  |  | 62.0 us-gaap_LitigationSettlementAmount / us-gaap_LitigationStatusAxis = tdw_CompensatoryPurposesMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementGeographicalAxis = country_VE

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- Definition Litigation Settlement Interest, Percentage of Interest + References No definition available. + Details
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- Definition Number of vessels seized. + References No definition available. + Details
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- Definition Amount of judgment or settlement awarded to (against) the entity in respect of litigation. + References No definition available. + Details
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