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Income Taxes (Details 2)	1 Months Ended	3 Months Ended				3 Months Ended
	May 31, 2013 NOK subsidiary	Mar. 31, 2015 USD ($) subsidiary jurisdiction	Mar. 31, 2015 NOK subsidiary jurisdiction	Dec. 31, 2005 USD ($)	Dec. 31, 2005 BRL	Mar. 31, 2015 Minimum	Mar. 31, 2015 Maximum	Mar. 31, 2015 Norway Tax Assessments Prior to 2012 USD ($) subsidiary advisor	Mar. 31, 2015 Norway Tax Assessments Prior to 2012 NOK subsidiary advisor	Mar. 31, 2015 Norway Tax Assessments 2012 USD ($) subsidiary advisor	Mar. 31, 2015 Norway Tax Assessments 2012 NOK	Mar. 31, 2015 2010 and 2011 federal income tax returns USD ($)	May 19, 2014 Brazil Tax Assessments 2009 And 2010 USD ($)	May 19, 2014 Brazil Tax Assessments 2009 And 2010 BRL
Income Tax Examination
Range of tax returns are subject to examination						3 years	6 years
Number of jurisdictions with extensions beyond statute of limitations		2rig_NumberOfMajorJurisdictionsWithExtensionsBeyondStatuteOfLimitations	2rig_NumberOfMajorJurisdictionsWithExtensionsBeyondStatuteOfLimitations
Maximum number of years agreed to extensions beyond the statute of limitations		20 years	20 years
Net adjustments of additional taxes, excluding interest and penalties, related to assessments on 2010 and 2011 U.S. federal income tax returns												$ 290,000,000us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss / rig_IncomeTaxExaminationByPeriodAxis = rig_USFederalIncomeTaxAssessment2010And2011Member
Norway tax assessment due to migration of subsidiary, including interest								85,000,000rig_TaxAssessmentOnMigrationOfSubsidiaryNorway / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	684,000,000rig_TaxAssessmentOnMigrationOfSubsidiaryNorway / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member
Norway tax assessment due to 2001 dividend payment, including interest								51,000,000rig_TaxAssessmentDueTo2001DividendNorway / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	412,000,000rig_TaxAssessmentDueTo2001DividendNorway / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member
Norway tax assessment due to foreign exchange deductions and dividend withholding taxes, including interest								5,000,000rig_TaxAssessmentDueToForeignExchangeNorway / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	43,000,000rig_TaxAssessmentDueToForeignExchangeNorway / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member
Number of subsidiaries against which notification of criminal charges are issued								2rig_NumberOfSubsidiariesAgainstWhichCriminalIndictmentsHaveBeenFiled / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	2rig_NumberOfSubsidiariesAgainstWhichCriminalIndictmentsHaveBeenFiled / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	2rig_NumberOfSubsidiariesAgainstWhichCriminalIndictmentsHaveBeenFiled / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessments2012Member	2rig_NumberOfSubsidiariesAgainstWhichCriminalIndictmentsHaveBeenFiled / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessments2012Member
Number of employees of former external advisors indicted								2rig_NumberOfFormerExternalTaxAdvisorsIssuedIndictmentsAgainstEntity / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	2rig_NumberOfFormerExternalTaxAdvisorsIssuedIndictmentsAgainstEntity / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessmentsPrior2012Member	2rig_NumberOfFormerExternalTaxAdvisorsIssuedIndictmentsAgainstEntity / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessments2012Member	2rig_NumberOfFormerExternalTaxAdvisorsIssuedIndictmentsAgainstEntity / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessments2012Member
Financial claim issued by the Norwegian authorities supplementing the criminal indictments										223,000,000rig_IncomeTaxInvestigationFinancialClaimIssuedUnderCriminalIndictment / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessments2012Member	1,800,000,000rig_IncomeTaxInvestigationFinancialClaimIssuedUnderCriminalIndictment / rig_IncomeTaxExaminationByPeriodAxis = rig_NorwayTaxAssessments2012Member
Financial claim dropped by the Norwegian authorities	1,800,000,000rig_IncomeTaxInvestigationFinancialClaimDropped
Number of subsidiaries against which notification of criminal charges are dropped	1rig_NumberOfSubsidiariesAgainstWhichCriminalIndictmentsHaveBeenDropped
Criminal penalties to be assessed by court in addition to civil tax penalties		29,000,000rig_IncomeTaxExaminationAmountOfCriminalPenaltiesToBeAssessedByCourtInAdditionToCivilTaxPenalties	230,000,000rig_IncomeTaxExaminationAmountOfCriminalPenaltiesToBeAssessedByCourtInAdditionToCivilTaxPenalties
Number of subsidiaries against which criminal penalties in addition to civil tax penalties will be assessed		3rig_NumberOfSubsidiariesAgainstWhichCriminalPenaltiesInAdditionToCivilTaxPenaltiesAreToBeAssessed	3rig_NumberOfSubsidiariesAgainstWhichCriminalPenaltiesInAdditionToCivilTaxPenaltiesAreToBeAssessed
Brazil tax assessment for income tax returns				$ 226,000,000rig_IncomeTaxExaminationLiabilityExcludingInterestAndPenaltiesRecordedBrazil	723,000,000rig_IncomeTaxExaminationLiabilityExcludingInterestAndPenaltiesRecordedBrazil								$ 39,000,000rig_IncomeTaxExaminationLiabilityExcludingInterestAndPenaltiesRecordedBrazil / rig_IncomeTaxExaminationByPeriodAxis = rig_BrazilTaxExaminationAssessmentsPeriod2009And2010Member	126,000,000rig_IncomeTaxExaminationLiabilityExcludingInterestAndPenaltiesRecordedBrazil / rig_IncomeTaxExaminationByPeriodAxis = rig_BrazilTaxExaminationAssessmentsPeriod2009And2010Member
Percentage of penalty and interest to be assessed by Brazil tax authorities				75.00%rig_IncomeTaxExaminationPercentagePenaltiesAssessedBeforeExaminationBrazil	75.00%rig_IncomeTaxExaminationPercentagePenaltiesAssessedBeforeExaminationBrazil								75.00%rig_IncomeTaxExaminationPercentagePenaltiesAssessedBeforeExaminationBrazil / rig_IncomeTaxExaminationByPeriodAxis = rig_BrazilTaxExaminationAssessmentsPeriod2009And2010Member	75.00%rig_IncomeTaxExaminationPercentagePenaltiesAssessedBeforeExaminationBrazil / rig_IncomeTaxExaminationByPeriodAxis = rig_BrazilTaxExaminationAssessmentsPeriod2009And2010Member

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- Definition

Represents the amount of criminal penalties to be assessed by the court in addition to civil tax penalties.

+ References

No definition available.

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- Definition

The estimated loss resulting from the income tax examination that has been accrued net of any adjustments as of the balance sheet date, excluding interest and penalties by the Brazilian taxing authorities.

+ References

No definition available.

+ Details

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- Definition

The rate of penalty to be assessed by Brazilian tax authorities if entity's efforts to overturn tax assessment are unsuccessful.

+ References

No definition available.

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- Definition

Represents the financial claim dropped by the tax authorities against one of the entity's subsidiaries.

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No definition available.

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- Definition

Represents the financial claim issued by the Norwegian authorities supplementing the criminal indictments.

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No definition available.

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- Definition

Maximum number of years the enterprise has agreed to extensions beyond the statute of limitations in four major jurisdictions.

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No definition available.

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- Definition

Represents the number of former external tax advisors, who issued indictments against the entity with respect to disclosures in the tax returns.

+ References

No definition available.

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Represents the number of jurisdictions with extensions beyond the statute of limitations.

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No definition available.

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- Definition

Represents the number of subsidiaries of the entity against which criminal indictments charges are dropped.

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No definition available.

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- Definition

Represents the number of subsidiaries of the entity against which criminal indictments charges are filed.

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No definition available.

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- Definition

Represents the number of subsidiaries against which criminal penalties in addition to civil tax penalties will be assessed by the court.

+ References

No definition available.

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- Definition

Range of period that the tax returns in the major jurisdictions in which the enterprise operates are generally subject to examination.

+ References

No definition available.

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Tax assessments by Norway on entity's actions involving dividend payment.

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Tax assessments by Norway on entity's actions involving certain foreign exchange deductions and dividend withholding taxes.

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- Definition

Tax assessments by Norway on entity's actions involving the migration of a subsidiary that was previously subject to tax in Norway.

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No definition available.

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- Definition

Estimated amount of loss resulting from an adverse tax position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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