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Shareholders' Equity (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 0 Months Ended 3 Months Ended
Mar. 18, 2015
Mar. 19, 2014
Mar. 31, 2015
item
Mar. 31, 2014
Feb. 15, 2015
installment
Dec. 31, 2014
May 31, 2014
installment
May 31, 2013
installment
Distribution of qualifying additional paid-in capital                
Cash distribution proposed in the form of additional paid-in capital (in dollars per share)         $ 0.60rig_CashDistributionPerShareProposedAsAdditionalPaidInCapital      
Cash distribution approved in the form of additional paid-in capital (in dollars per share)             $ 3.00rig_CashDistributionPerShareApprovedAsAdditionalPaidInCapital $ 2.24rig_CashDistributionPerShareApprovedAsAdditionalPaidInCapital
Number of quarterly installments (in installments)         4rig_NumberOfQuarterlyInstallments   4rig_NumberOfQuarterlyInstallments 4rig_NumberOfQuarterlyInstallments
Amount of installment (in dollars per share)         $ 0.15rig_AmountOfInstallment   $ 0.75rig_AmountOfInstallment $ 0.56rig_AmountOfInstallment
Installment of dividend paid $ 272us-gaap_PaymentsOfCapitalDistribution $ 202us-gaap_PaymentsOfCapitalDistribution $ 272us-gaap_PaymentsOfCapitalDistribution $ 202us-gaap_PaymentsOfCapitalDistribution        
Unpaid distribution payable           $ 272us-gaap_DividendsPayableCurrent    
Shares held by subsidiary                
Number of subsidiaries to whom shares were issued     1rig_NumberOfSubsidiariesToWhomSharesWereIssued          
Number of shares held by subsidiary     7.6rig_CommonStockHeldBySubsidiaryShares     8.7rig_CommonStockHeldBySubsidiaryShares