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Commitments and Contingencies (Details) |  |  | 0 Months Ended |  |  |  |  |  |  | 3 Months Ended |  | 1 Months Ended |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |  | 1 Months Ended |  |
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Mar. 31, 2015 item | Jul. 31, 2014 Petrobras USD ($) | Jul. 31, 2014 Petrobras BRL | Sep. 04, 2014 Macondo well incident subsidiary item | Mar. 31, 2015 Macondo well incident USD ($) claim | Jan. 15, 2015 Macondo well incident bbl | Dec. 31, 2014 Macondo well incident USD ($) | Sep. 04, 2014 Macondo well incident | Jan. 03, 2013 Macondo well incident USD ($) | Apr. 22, 2010 Macondo well incident mi person | Mar. 31, 2015 Macondo well incident Wrongful death and personal injury lawsuit | Mar. 31, 2015 Macondo well incident Economic loss lawsuit | Mar. 31, 2015 Macondo well incident State and other government claims item | Mar. 31, 2015 Macondo well incident Natural Resources Damages Assessments item | Jan. 31, 2013 Macondo well incident Citizen suits under environmental statutes item | Sep. 30, 2010 Macondo well incident Federal securities claims subsidiary | Mar. 31, 2015 Macondo well incident Wreck removal USD ($) | Apr. 22, 2010 Macondo well incident Insurance coverage USD ($) | Mar. 31, 2015 Macondo well incident Contractual indemnity USD ($) | Sep. 04, 2014 Macondo well incident BP | Sep. 04, 2014 Macondo well incident Halliburton | Mar. 31, 2015 Macondo well incident Consent Decree USD ($) | Mar. 31, 2014 Macondo well incident Consent Decree USD ($) | Mar. 31, 2015 Asbestos litigation USD ($) lawsuit subsidiary plaintiff item | Dec. 31, 2004 Asbestos litigation plaintiff lawsuit | Mar. 31, 2015 Asbestos litigation Minimum subsidiary | Sep. 30, 2006 Rio de Janeiro tax assessment USD ($) subsidiary | Sep. 30, 2006 Rio de Janeiro tax assessment BRL | Dec. 31, 2010 Brazilian import license assessment USD ($) | Dec. 31, 2010 Brazilian import license assessment BRL | Oct. 31, 2007 Nigerian Cabotage Act litigation subsidiary | Mar. 31, 2015 Hazardous waste disposal sites subsidiary | Mar. 31, 2015 Retained risk USD ($) | Mar. 31, 2015 Letters of credit and surety bonds USD ($) | Dec. 31, 2014 Letters of credit and surety bonds USD ($)
Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of persons declared dead |  |  |  |  |  |  |  |  |  | 11 rig_NumberOfPersonsDeclaredDead / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of miles Deepwater Horizon was off coast of Louisiana |  |  |  |  |  |  |  |  |  | 41 rig_NumberOfMilesOffCoast / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of fines, recoveries and civil penalties |  | $ 89,000,000 us-gaap_LossContingencyEstimateOfPossibleLoss / dei_LegalEntityAxis = rig_PetrobrasMember | 283,000,000 us-gaap_LossContingencyEstimateOfPossibleLoss / dei_LegalEntityAxis = rig_PetrobrasMember |  | $ 426,000,000 us-gaap_LossContingencyEstimateOfPossibleLoss / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  | $ 426,000,000 us-gaap_LossContingencyEstimateOfPossibleLoss / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  | $ 1,400,000,000 us-gaap_LossContingencyEstimateOfPossibleLoss / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for obligations under the Plea Agreement and Consent Decree including interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 264,000,000 rig_ContractualObligationPayment / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / rig_LitigationCaseTypeOfAgreementAxis = rig_ConsentDecreeMember | 472,000,000 rig_ContractualObligationPayment / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / rig_LitigationCaseTypeOfAgreementAxis = rig_ConsentDecreeMember |  |  |  |  |  |  |  |  |  |  |  |
Portion of liability related to the rig explosion and fire incident recoverable from insurance |  |  |  |  | 10,000,000 us-gaap_EstimatedInsuranceRecoveries / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of phases of the trial completed | 2 rig_NumberOfPhasesCompleted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of fault assigned by the court |  |  |  |  |  |  |  | 30 rig_LossContingencyPercentageOfFaultAssigned / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  | 67 rig_LossContingencyPercentageOfFaultAssigned / dei_LegalEntityAxis = rig_BPMember / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember | 3 rig_LossContingencyPercentageOfFaultAssigned / dei_LegalEntityAxis = rig_HalliburtonMember / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of bases for imposing negligence liability |  |  |  | 3 rig_BasesForImposingNegligenceLiabilityNumber / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of failures determined by the MDL Court |  |  |  | 3 rig_NumberOfFailuresDeterminedByMdlCourt / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of wholly owned subsidiary that could not limit their liability under the Limitation of Liability Act |  |  |  | 3 rig_NumberOfWhollyOwnedSubsidiaryThatCouldNotLimitTheirLiabilityUnderLimitationOfLiabilityAct / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of entities that released from liability under general maritime law |  |  |  | 2 rig_NumberOfEntitiesThatReleasedFromLiabilityUnderGeneralMaritimeLaw / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of non-operating interest of Anadarko in the Macondo well |  |  |  |  | 25.00%rig_PercentageOfNonoperatingInterestOfAnadarkoPetroleumCorporation / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of non-operating interest of MOEX in the Macondo well |  |  |  |  | 10.00%rig_PercentageOfNonoperatingInterestOfMOEXOffshore / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period within which opening briefs are to be filed |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of barrels of oil discharged during the spill determined by the court |  |  |  |  |  | 4,000,000 rig_VolumeOfOilDischargeInSpill / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of barrels of oil discharged during the spill, net of collected, on which penalty may be imposed |  |  |  |  |  | 3,190,000 rig_VolumeOfOildDischargeInSpillNetOfRecoveryPenaltyBasis / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of actions or claims that were pending |  |  |  |  | 1,405 rig_NumberOfActionsOrClaimsPendingInStateAndFederalCourts / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember |  |  |  |  |  | 9 rig_NumberOfActionsOrClaimsPendingInStateAndFederalCourts / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_WrongfulDeathAndPersonalInjuryMember | 982 rig_NumberOfActionsOrClaimsPendingInStateAndFederalCourts / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_EconomicLossMember |  |  |  |  |  |  |  |  |  |  |  |  | 21 rig_NumberOfActionsOrClaimsPendingInStateAndFederalCourts / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |
Number of complaints that involve fatalities |  |  |  |  |  |  |  |  |  |  | 9 rig_ContractualObligationNumberOfComplaintsInvolvingFatalities / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_WrongfulDeathAndPersonalInjuryMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of complaints that seek recovery for bodily injuries |  |  |  |  |  |  |  |  |  |  | 63 rig_LossContingencyNumberOfComplaintsSeekingRecoveryForBodilyInjuries / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_WrongfulDeathAndPersonalInjuryMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of putative class action complaints filed alleging, among other things, economic losses as a result of environmental pollution arising out of the Macondo well incident (in lawsuits) |  |  |  |  |  |  |  |  |  |  |  | 190 rig_NumberOfPutativeClassActionComplaintsFiledAllegingEconomicLosses / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_EconomicLossMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of state, local and foreign governments who have filed lawsuits |  |  |  |  |  |  |  |  |  |  |  |  | 200 rig_LawsuitsFiledByNumberOfStateLocalAndForeignGovernments / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_StateAndOtherGovernmentClaimsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Atlantic Coast states Attorneys General wanting assurances of financial responsibility for potential damages |  |  |  |  |  |  |  |  |  |  |  |  | 11 rig_NumberOfAtlanticCoastStatesSeekingAssurancesForRecoveryOfDamagesMacondoWellIncident / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_StateAndOtherGovernmentClaimsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of requests for natural resources damages assessments |  |  |  |  |  |  |  |  |  |  |  |  |  | 11 rig_NumberOfRequestsForNaturalResourcesDamagesAssessments / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_NaturalResourcesDamagesAssessmentsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of exceptions in dismissal of claims |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_NumberOfExceptionsInDismissalOfClaims / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_CitizenSuitsUnderEnvironmentalStatutesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acquired companies as defendants in class action in U.S. District Court for the Southern District of New York |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_NumberAcquiredCompaniesDefendants / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_FederalSecuritiesClaimsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of asset value covered |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00%rig_PercentageOfAssetValueCoveredInHundredths / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_WreckRemovalMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset value covered by wreck removal insurance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 140,000,000 rig_AssetValueCoveredByWreckRemovalInsurance / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_WreckRemovalMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of pending separate lawsuits remained, each with a single plaintiff |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 rig_NumberOfPendingLawsuits / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Number of years of litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Number of plaintiffs whose litigation remains pending against subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 rig_LossContingencyNumberOfPlaintiffsWhoseLitigationIsPendingAgainstSubsidiaries / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries that were served a Notice and Demand from the Nigeria Maritime Administration and Safety Agency (NIMASA) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 rig_NumberOfSubsidiariesThatWereServedNoticeAndDemandFromNigeriaMaritimeAdministrationAndSafetyAgency / us-gaap_LitigationCaseAxis = rig_NigerianCabotageActLitigationMember |  |  |  |
Percentage of surcharge on the value of contracts performed in Nigeria pursuant to the Coastal and Inland Shipping (Cabotage) Act 2003 (the Cabotage Act) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 rig_PercentageOfSurchargeOnValueOfContractsImposedOnSubsidiaries / us-gaap_LitigationCaseAxis = rig_NigerianCabotageActLitigationMember |  |  |  |
Insured status under excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 950,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgram / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deductible amount under excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramDeductibleAmount / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount covered by self insured layer of excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramSelfInsuredLayer / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount covered by first layer of excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerFirst / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount covered by second layer of excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerSecond / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount covered by third layer of excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerThird / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount covered by fourth layer of excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerFourth / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount covered by fifth layer of excess liability insurance program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,000,000 rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerFifth / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_InsuranceCoverageMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount agreed to indemnify and defend operator of rig |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000,000 rig_LimitOfIndemnityForRigOperator / us-gaap_LitigationCaseAxis = rig_MacondoWellIncidentMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = rig_ContractualIndemnityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of claimants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 769 us-gaap_LossContingencyNumberOfPlaintiffs / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |
Number of lawsuits in which case is pending against subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 rig_NumberOfLawsuitsInWhichCaseIsPendingAgainstSubsidiaries / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries against which cases are pending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_NumberOfSubsidiariesAgainstWhichCasesArePending / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |
Number of subsidiaries involved in lawsuits arising from design, construction and refurbishment of major industrial complexes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_NumberOfSubsidiariesInvolvedInLawsuitsArisingFromDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits alleging personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 693 rig_NumberOfLawsuitsAllegingPersonalInjuryFromAsbestosExposureForSubsidiaryInvolvedInDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Estimated number of plaintiffs in lawsuits alleging personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 945 rig_EstimatedNumberOfPlaintiffsInLawsuitsAllegingPersonalInjuryFromAsbestosExposureForSubsidiaryInvolvedInDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Insurance limits potentially available for damages in lawsuits regarding personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000,000 rig_InsuranceLimitsPotentiallyAvailableForDamagesInLawsuitsRegardingPersonalInjuryFromAsbestosExposureForSubsidiaryInvolvedInDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes / us-gaap_LitigationCaseAxis = rig_AsbestosLitigationMember |  |  |  |  |  |  |  |  |  |  |
Tax assessment from state tax authorities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 134,000,000 rig_TaxAssessmentFromStateTaxAuthorities / us-gaap_LitigationCaseAxis = rig_RioDeJaneiroTaxAssessmentMember | 428,000,000 rig_TaxAssessmentFromStateTaxAuthorities / us-gaap_LitigationCaseAxis = rig_RioDeJaneiroTaxAssessmentMember | 169,000,000 rig_TaxAssessmentFromStateTaxAuthorities / us-gaap_LitigationCaseAxis = rig_BrazilianImportLicenseAssessmentMember | 539,000,000 rig_TaxAssessmentFromStateTaxAuthorities / us-gaap_LitigationCaseAxis = rig_BrazilianImportLicenseAssessmentMember |  |  |  |  |
Number of subsidiaries involved in tax assessment relating to import license |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_NumberOfSubsidiariesInvolvedInTaxAssessment / us-gaap_LitigationCaseAxis = rig_RioDeJaneiroTaxAssessmentMember | 1 rig_NumberOfSubsidiariesInvolvedInTaxAssessment / us-gaap_LitigationCaseAxis = rig_RioDeJaneiroTaxAssessmentMember |  |  |  |  |  |  |
Total amount of tax assessment from state tax authorities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 rig_TotalAmountOfTaxAssessmentFromStateTaxAuthorities / us-gaap_LitigationCaseAxis = rig_BrazilianImportLicenseAssessmentMember | 36,000,000 rig_TotalAmountOfTaxAssessmentFromStateTaxAuthorities / us-gaap_LitigationCaseAxis = rig_BrazilianImportLicenseAssessmentMember |  |  |  |  |
Percentage of liability for remediation and related costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00%rig_PercentageOfLiabilityForRemediationAndRelatedCosts / us-gaap_LitigationCaseAxis = rig_HazardousWasteDisposalSitesMember |  |  |
Number of subsidiaries ordered by California Regional Water Quality Control Board to develop testing plan for Alhambra, California site |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_NumberOfSubsidiariesOrderedByCaliforniaRegionalWaterQualityControlBoardToDevelopTestingPlanForAlhambraCaliforniaSite / us-gaap_LitigationCaseAxis = rig_HazardousWasteDisposalSitesMember |  |  |
Minimum number of subsidiaries likely to be named potentially responsible party by US Environmental Protection Agency for superfund site (in counts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 rig_MinimumNumberOfSubsidiariesLikelyToBeNamedPotentiallyResponsiblePartyByUSEnvironmentalProtectionAgencyForSuperfundSite / us-gaap_LitigationCaseAxis = rig_HazardousWasteDisposalSitesMember |  |  |
Aggregate value of drilling rig fleet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,600,000,000 rig_AggregateValueOfDrillingRigFleet / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Per occurrence insurance deductible on hull and machinery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,000,000 rig_PerOccurrenceInsuranceDeductibleOnHullAndMachinery / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Maximum aggregate insurance deductible on hull and machinery per year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 rig_MaximumAggregateInsuranceDeductibleOnHullAndMachineryPerYear / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Maximum percentage of asset insured value covered by damage mitigation insurance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00%rig_MaximumPercentageOfAssetInsuredValueCoveredByDamageMitigationInsurance / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Commercial market excess liability coverage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000,000 rig_CommercialMarketExcessLiabilityCoverage / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Per occurrence deductible on collision liability claims |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000,000 rig_PerOccurrenceDeductibleOnCollisionLiabilityClaims / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Per occurrence deductible on crew personal injury and other third-party non-crew claims |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 rig_PerOccurrenceDeductibleOnCrewPersonalInjuryAndOtherThirdPartyNonCrewClaims / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Per occurrence deductible on excess liability for which risk is retained by wholly-owned insurance company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 rig_PerOccurrenceDeductibleOnExcessLiabilityForWhichRiskIsRetained / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Liability loss excess amount for commercial market excess liability coverage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 750,000,000 rig_LiabilityLossExcessAmountForCommercialMarketExcessLiabilityCoverage / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Additional insurance that covers expenses that would otherwise be assumed by the well owner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 rig_AdditionalInsuranceToCoverExpensesThatWouldOtherwiseBeCoveredByWellOwner / us-gaap_LitigationCaseAxis = rig_RetainedRiskMember |  |
Outstanding letters of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 305,000,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_LitigationCaseAxis = rig_LettersOfCreditAndSuretyBondsMember | 338,000,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_LitigationCaseAxis = rig_LettersOfCreditAndSuretyBondsMember
Letters of credit issued under committed and uncommitted credit lines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 79,000,000 rig_LettersOfCreditIssuedUnderCommittedAndUncommittedCreditLinesAmount / us-gaap_LitigationCaseAxis = rig_LettersOfCreditAndSuretyBondsMember | 91,000,000 rig_LettersOfCreditIssuedUnderCommittedAndUncommittedCreditLinesAmount / us-gaap_LitigationCaseAxis = rig_LettersOfCreditAndSuretyBondsMember
Surety bonds outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000,000 rig_OutstandingSuretyBonds / us-gaap_LitigationCaseAxis = rig_LettersOfCreditAndSuretyBondsMember | $ 6,000,000 rig_OutstandingSuretyBonds / us-gaap_LitigationCaseAxis = rig_LettersOfCreditAndSuretyBondsMember

X
- Definition Additional insurance that generally covers expenses that would otherwise be assumed by the well owner, such as costs to control the well, redrill expenses and pollution from the well. + References No definition available. + Details
Name: | rig_AdditionalInsuranceToCoverExpensesThatWouldOtherwiseBeCoveredByWellOwner
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate insured value of drilling rig fleet. + References No definition available. + Details
Name: | rig_AggregateValueOfDrillingRigFleet
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of asset value covered by wreck removal insurance. + References No definition available. + Details
Name: | rig_AssetValueCoveredByWreckRemovalInsurance
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the number of bases for imposing negligence liability. + References No definition available. + Details
Name: | rig_BasesForImposingNegligenceLiabilityNumber
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commercial market excess liability coverage, exclusive of deductibles and self-insured retention, which generally covers offshore risks such as personal injury, third-party property claims, and third-party non-crew claims, including wreck removal and pollution. + References No definition available. + Details
Name: | rig_CommercialMarketExcessLiabilityCoverage
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the number of complaints that involve fatalities. + References No definition available. + Details
Name: | rig_ContractualObligationNumberOfComplaintsInvolvingFatalities
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The payments made in the period which reduced contractual obligation. + References No definition available. + Details
Name: | rig_ContractualObligationPayment
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Estimated number of plaintiffs in lawsuits alleging personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes. + References No definition available. + Details
Name: | rig_EstimatedNumberOfPlaintiffsInLawsuitsAllegingPersonalInjuryFromAsbestosExposureForSubsidiaryInvolvedInDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the aggregate insurance coverage provided under the entity's excess liability insurance program at the time of the Macondo well incident. + References No definition available. + Details
Name: | rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgram
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the deductible amount under the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
Name: | rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramDeductibleAmount
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of insurance coverage provided under the fifth layer of the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
Name: | rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerFifth
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of insurance coverage provided under the first layer of the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of insurance coverage provided under the second layer of the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of insurance coverage provided under the third layer of the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of insurance coverage provided under the fourth layer of the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
Name: | rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramLayerThird
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the self insured retention layer under the entity's excess liability insurance program at the time of Macondo well incident. + References No definition available. + Details
Name: | rig_InsuranceCoverageUnderExcessLiabilityInsuranceProgramSelfInsuredLayer
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Insurance limits potentially available for damages in lawsuits regarding personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes. + References No definition available. + Details
Name: | rig_InsuranceLimitsPotentiallyAvailableForDamagesInLawsuitsRegardingPersonalInjuryFromAsbestosExposureForSubsidiaryInvolvedInDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the number of state, local and foreign governments who have filed lawsuits. + References No definition available. + Details
Name: | rig_LawsuitsFiledByNumberOfStateLocalAndForeignGovernments
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total amount of letters of credit issued under committed and uncommitted credit lines provided by several banks related to the financial support of the disposal group. + References No definition available. + Details
Name: | rig_LettersOfCreditIssuedUnderCommittedAndUncommittedCreditLinesAmount
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Insurance liability loss retained risk excess amount for commercial market excess liability coverage. + References No definition available. + Details
Name: | rig_LiabilityLossExcessAmountForCommercialMarketExcessLiabilityCoverage
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount agreed to indemnify and defend operator of Deepwater Horizon. + References No definition available. + Details
Name: | rig_LimitOfIndemnityForRigOperator
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period to file opening briefs in a case litigation. + References No definition available. + Details
Name: | rig_LitigationPeriodOfFilingBriefs
Namespace Prefix: | rig_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of complaints that seek recovery for bodily injuries. + References No definition available. + Details
Name: | rig_LossContingencyNumberOfComplaintsSeekingRecoveryForBodilyInjuries
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of plaintiffs whose litigation remains pending against subsidiaries. + References No definition available. + Details
Name: | rig_LossContingencyNumberOfPlaintiffsWhoseLitigationIsPendingAgainstSubsidiaries
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of fault assigned in the legal matter. + References No definition available. + Details
Name: | rig_LossContingencyPercentageOfFaultAssigned
Namespace Prefix: | rig_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum aggregate insurance deductible on hull and machinery per year. + References No definition available. + Details
Name: | rig_MaximumAggregateInsuranceDeductibleOnHullAndMachineryPerYear
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The maximum percentage of a rig's insured value covered for costs incurred to mitigate damage. + References No definition available. + Details
Name: | rig_MaximumPercentageOfAssetInsuredValueCoveredByDamageMitigationInsurance
Namespace Prefix: | rig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum number of subsidiaries likely to be named a potentially responsible party by the US Environmental Protection Agency for a superfund site. + References No definition available. + Details
Name: | rig_MinimumNumberOfSubsidiariesLikelyToBeNamedPotentiallyResponsiblePartyByUSEnvironmentalProtectionAgencyForSuperfundSite
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of acquired companies by the entity that are named as defendants in class action suits. + References No definition available. + Details
Name: | rig_NumberAcquiredCompaniesDefendants
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of claims pending against the entity and subsidiaries, along with other unaffiliated defendants, in state and federal courts. + References No definition available. + Details
Name: | rig_NumberOfActionsOrClaimsPendingInStateAndFederalCourts
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Atlantic Coast states Attorneys General wanting assurances of financial responsibility for potential damages related to the Macondo well incident. + References No definition available. + Details
Name: | rig_NumberOfAtlanticCoastStatesSeekingAssurancesForRecoveryOfDamagesMacondoWellIncident
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of entities that released from liability under general maritime law. + References No definition available. + Details
Name: | rig_NumberOfEntitiesThatReleasedFromLiabilityUnderGeneralMaritimeLaw
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of exceptions in dismissal of claims. + References No definition available. + Details
Name: | rig_NumberOfExceptionsInDismissalOfClaims
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of failures held by the MDL Court to be within the entity's privity and knowledge. + References No definition available. + Details
Name: | rig_NumberOfFailuresDeterminedByMdlCourt
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of lawsuits alleging personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes. + References No definition available. + Details
Name: | rig_NumberOfLawsuitsAllegingPersonalInjuryFromAsbestosExposureForSubsidiaryInvolvedInDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of lawsuits in which case is pending against subsidiaries. + References No definition available. + Details
Name: | rig_NumberOfLawsuitsInWhichCaseIsPendingAgainstSubsidiaries
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of miles off the coast of Louisiana the Deepwater Horizon was at time of explosion and fire on the rig operating in the Gulf of Mexico. + References No definition available. + Details
Name: | rig_NumberOfMilesOffCoast
Namespace Prefix: | rig_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of pending lawsuits. + References No definition available. + Details
Name: | rig_NumberOfPendingLawsuits
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of persons declared dead from the Macondo well incident. + References No definition available. + Details
Name: | rig_NumberOfPersonsDeclaredDead
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of phases completed in a trial. + References No definition available. + Details
Name: | rig_NumberOfPhasesCompleted
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of putative class action complaints filed alleging, among other things, economic losses as a result of environmental pollution. + References No definition available. + Details
Name: | rig_NumberOfPutativeClassActionComplaintsFiledAllegingEconomicLosses
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of requests for natural resources damages assessments. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of subsidiaries against which cases are pending. + References No definition available. + Details
Name: | rig_NumberOfSubsidiariesAgainstWhichCasesArePending
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of subsidiaries involved in lawsuits arising from design, construction and refurbishment of major industrial complexes. + References No definition available. + Details
Name: | rig_NumberOfSubsidiariesInvolvedInLawsuitsArisingFromDesignConstructionAndRefurbishmentOfMajorIndustrialComplexes
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of subsidiaries involved in Rio de Janeiro tax assessment. + References No definition available. + Details
Name: | rig_NumberOfSubsidiariesInvolvedInTaxAssessment
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of subsidiaries ordered by California Regional Water Quality Control Board to develop a testing plan for Alhambra, California site. + References No definition available. + Details
Name: | rig_NumberOfSubsidiariesOrderedByCaliforniaRegionalWaterQualityControlBoardToDevelopTestingPlanForAlhambraCaliforniaSite
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of subsidiaries that were served a Notice and Demand from the Nigeria Maritime Administration and Safety Agency (NIMASA). + References No definition available. + Details
Name: | rig_NumberOfSubsidiariesThatWereServedNoticeAndDemandFromNigeriaMaritimeAdministrationAndSafetyAgency
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of wholly owned subsidiary that could not limit their liability under the Limitation of Liability Act. + References No definition available. + Details
Name: | rig_NumberOfWhollyOwnedSubsidiaryThatCouldNotLimitTheirLiabilityUnderLimitationOfLiabilityAct
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Numbers year years of litigation + References No definition available. + Details
Name: | rig_NumberOfYearsOfLitigation
Namespace Prefix: | rig_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Outstanding amount of surety bonds that secure customs obligations relating to the importation of our rigs and certain performance and other obligations. + References No definition available. + Details
Name: | rig_OutstandingSuretyBonds
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents cash inflow associated with sale and disposition of assets. + References No definition available. + Details
Name: | rig_PercentageOfAssetValueCoveredInHundredths
Namespace Prefix: | rig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage of liability under participation agreement for remediation and related costs from hazardous waste disposal site. + References No definition available. + Details
Name: | rig_PercentageOfLiabilityForRemediationAndRelatedCosts
Namespace Prefix: | rig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the non-operating interest of Anadarko in the Macondo well. + References No definition available. + Details
Name: | rig_PercentageOfNonoperatingInterestOfAnadarkoPetroleumCorporation
Namespace Prefix: | rig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the non-operating interest of MOEX in the Macondo well. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of surcharge imposed on subsidiaries. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Per occurrence deductible on collision liability claims. + References No definition available. + Details
Name: | rig_PerOccurrenceDeductibleOnCollisionLiabilityClaims
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Per occurrence deductible on crew personal injury liability and other third party non-crew claims. + References No definition available. + Details
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Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Per occurrence deductible on excess liability for which risk is retained by wholly-owned insurance company. + References No definition available. + Details
Name: | rig_PerOccurrenceDeductibleOnExcessLiabilityForWhichRiskIsRetained
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Per occurrence insurance deductible on hull and machinery. + References No definition available. + Details
Name: | rig_PerOccurrenceInsuranceDeductibleOnHullAndMachinery
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Tax assessment from federal tax authorities of Rio de Janeiro in Brazil relating to failure to timely apply for and improper information on import license application. + References No definition available. + Details
Name: | rig_TaxAssessmentFromStateTaxAuthorities
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Total amount of tax assessment from federal tax authorities of Rio de Janeiro in Brazil relating to failure to timely apply for and improper information on import license application. + References No definition available. + Details
Name: | rig_TotalAmountOfTaxAssessmentFromStateTaxAuthorities
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Volume of oil discharged during a spill, net of recovery, on which penalty can be imposed on. + References No definition available. + Details
Name: | rig_VolumeOfOildDischargeInSpillNetOfRecoveryPenaltyBasis
Namespace Prefix: | rig_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

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- Definition Volume of oil discharged during a spill. + References No definition available. + Details
Name: | rig_VolumeOfOilDischargeInSpill
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