v2.4.0.8

Shareholders' Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 item | Jun. 18, 2014 | Mar. 19, 2014 | Jun. 19, 2013 | May 31, 2014 item | May 31, 2013 item | Jun. 30, 2014 item | Jun. 30, 2013 | Jun. 30, 2014 item | Jun. 30, 2013 | Dec. 31, 2013
Distribution of qualifying additional paid-in capital |  |  |  |  |  |  |  |  |  |  |
Cash distribution approved in the form of additional paid-in capital (in dollars per share) |  |  |  |  | $ 3.00 | $ 2.24 |  |  |  |  |
Number of quarterly installments (in installments) |  |  |  |  | 4 | 4 |  |  |  |  |
Amount of installment (in dollars per share) |  |  |  |  | $ 0.75 | $ 0.56 |  |  |  |  |
Liability for distribution payable | $ 816 |  |  |  | $ 1,100 | $ 808 |  |  |  |  |
Installment of dividend paid |  | $ 272 | $ 202 | $ 202 |  |  | $ 272 | $ 202 | $ 474 | $ 202 |
Shares held by subsidiary |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries to whom shares were issued | 1 |  |  |  |  |  | 1 |  | 1 |  |
Number of shares held by subsidiary | 8.8 |  |  |  |  |  | 8.8 |  | 8.8 |  | 10.2

X
- Definition Represents the amount of each installment of the shareholder approved distribution. + References No definition available. + Details
Name: | rig_AmountOfInstallment
Namespace Prefix: | rig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash distribution of qualifying additional paid-in capital approved at annual general meeting. + References No definition available. + Details
Name: | rig_CashDistributionPerShareApprovedAsAdditionalPaidInCapital
Namespace Prefix: | rig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares held by subsidiary, which were issued for the purpose of granting the shares to senior employees as part of an employee stock option plan approved by the Entity's Board of Directors. + References No definition available. + Details
Name: | rig_CommonStockHeldBySubsidiaryShares
Namespace Prefix: | rig_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | rig_DistributionOfQualifyingAdditionalPaidInCapitalAbstract
Namespace Prefix: | rig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of quarterly installments to pay the proposed dividend. + References No definition available. + Details
Name: | rig_NumberOfQuarterlyInstallments
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of subsidiaries to whom shares were issued for future use to satisfy our obligations to deliver shares in connection with awards granted under our incentive plans or other rights to acquire our shares. + References No definition available. + Details
Name: | rig_NumberOfSubsidiariesToWhomSharesWereIssued
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | rig_SharesHeldBySubsidiaryAbstract
Namespace Prefix: | rig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Approximate aggregate amount of U.S. dollar-denominated distribution of qualifying additional paid-in capital approved by the shareholders at annual general meeting. + References No definition available. + Details
Name: | rig_USDollarDenominatedDividend
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Cash outflow to owners or shareholders, excluding ordinary dividends. Includes special dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfCapitalDistribution
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration