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Commitments and Contingencies (Venezuelan Operations) - Additional Information (Detail) | 1 Months Ended
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May 31, 2009 Vessel | Jul. 31, 2009 Vessel
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

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- Details
Name: | tdw_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of vessels seized. + References No definition available. + Details
Name: | tdw_NumberOfVesselSeized
Namespace Prefix: | tdw_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | tdw_PossessingCompanyAxis=tdw_PetrosucreSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tdw_PossessingCompanyAxis=tdw_VenezuelanNationalOilCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |