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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
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 15tdw_NumberOfVesselSeized      
Venezuelan National Oil Company        
Commitments and Contingencies Disclosure [Line Items]        
Number of vessels seized   11tdw_NumberOfVesselSeized
/ tdw_PossessingCompanyAxis
= tdw_VenezuelanNationalOilCompanyMember		    
Petrosucre S        
Commitments and Contingencies Disclosure [Line Items]        
Number of vessels seized     4tdw_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       46.4us-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       13.9us-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       2.5us-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       62.0us-gaap_LitigationSettlementAmount
/ us-gaap_LitigationStatusAxis
= tdw_CompensatoryPurposesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementGeographicalAxis
= country_VE