v2.4.0.8

Discontinued Operations (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  |  | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 | Dec. 31, 2013 Drilling management services | Jun. 30, 2014 Shelf Drilling Holdings, Ltd drillingunit | Jun. 30, 2014 Shelf Drilling Holdings, Ltd drillingunit | Dec. 31, 2013 Shelf Drilling Holdings, Ltd | Nov. 30, 2012 Shelf Drilling Holdings, Ltd drillingunit | Jun. 30, 2013 Standard Jackups D.R. Stewart, Interocean III and GSF Adriatic VIII and related equipment | Feb. 28, 2014 ADTI item | Jun. 30, 2014 ADTI | Jun. 30, 2014 ADTI | Jun. 30, 2013 Disposal of assets unrelated to rig sales | Jun. 30, 2013 Disposal of assets unrelated to rig sales
Summarized results of discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 25 | $ 262 | $ 133 | $ 515 |  |  |  |  |  |  |  |  |  |  |  |
Operating and maintenance expense | (27) | (269) | (131) | (534) |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposal of assets in discontinued operations, net |  | 3 | (10) | 18 |  |  |  |  |  |  |  |  | (1) | (12) |  |
Loss from discontinued operations before income tax expense | (2) | (4) | (8) | (1) |  |  |  |  |  |  |  |  |  |  |  |
Income tax (expense) | (5) | (7) | (7) | (13) |  |  |  |  |  |  |  |  |  |  |  |
Loss from discontinued operations, net of tax | (7) | (11) | (15) | (14) |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Materials and supplies, net | 2 |  | 2 |  | 18 |  | 2 | 2 | 19 |  |  |  |  |  |  |
Other related assets |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |
Assets held for sale | 2 |  | 2 |  | 19 |  |  |  |  |  |  |  |  |  |  |
Other current assets |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |
Total current assets | 2 |  | 2 |  | 25 |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  | 8 |  |  |  |  |  |  |  |  |  |  |
Other current liabilities |  |  |  |  | 8 |  |  |  |  |  |  |  |  |  |  |
Summarized results of Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Drilling Units Sold |  |  |  |  |  |  |  |  |  | 38 |  |  |  |  |  |
Number of Standard Jackups (in drilling units) |  |  |  |  |  |  | 2 | 2 |  |  |  |  |  |  |  |
Proceeds from disposal of assets, net | 10 | 3 | 101 | 4 |  |  | 22 | 25 |  |  | 63 |  |  |  |  |
Gain on disposal of assets, net | 1 | (2) | (2) | (9) |  |  | 1 | 2 |  |  | 15 |  |  |  | 3 | 3
Aggregate gain (loss) on sale of assets per diluted share (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.04 |  | $ (0.03) | $ (0.03) | $ 0.01 | $ 0.01
Aggregate gain (loss) on disposal of assets, tax effect |  |  |  |  |  |  | 0 | 0 |  |  | 0 |  | 0 | 0 | 0 | 0
Maximum financial support |  |  |  |  |  |  | 125 | 125 |  |  |  |  |  |  |  |
Letters of credit issued under committed and uncommitted credit lines |  |  |  |  |  |  | 105 | 105 | 104 | 113 |  |  |  |  |  |
Maximum additional financial support, excluding parent guarantees |  |  |  |  |  |  | 65 | 65 |  |  |  |  |  |  |  |
Proceeds from disposal of discontinued operations, net | 22 |  | 36 | 63 |  |  |  |  |  |  |  |  |  | 11 |  |
Aggregate carrying amounts of assets associated with disposal group |  |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |
Limited guarantee provided in favor of number of customer through expiration of the current drilling project |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Working capital line of credit to the buyer |  |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |
Fixed interest percentage on working capital line of credit to buyer |  |  |  |  |  |  |  |  |  |  |  |  | 8.30% | 8.30% |  |
Borrowings outstanding under working capital line of credit to buyer |  |  |  |  |  |  |  |  |  |  |  |  | $ 15 | $ 15 |  |

X
- Definition The aggregate value for the disposal group, including a component of the entity (discontinued operations), carrying value (net of accumulated depreciation and any write-downs) of property, plant and equipment and other current assets that are held for sale apart from normal operations and anticipated to be sold in less than one year. + References No definition available. + Details
Name: | rig_AssetsOfDisposalGroupIncludedInAssetsHeldForSale
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition For the disposal group, including a component of the entity (discontinued operation), carrying value (net of allowance for obsolescence and any write-downs) of materials and supplies that is held for sale apart from normal operations and anticipated to be sold in less than one year. + References No definition available. + Details
Name: | rig_DisposalGroupIncludingDiscontinuedOperationMaterialsAndSuppliesHeldForSale
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Represents the number of customers in favor of whom a limited guarantee has been provided by the entity through expiration of the current project. + References No definition available. + Details
Name: | rig_DisposalGroupsIncludingDiscontinuedLimitedGuaranteeProvidedInFavorOfNumberOfCustomers
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount outstanding under the working capital line of credit provided by the entity to the buyer of discontinued non-strategic operations on completion of the sale transaction. + References No definition available. + Details
Name: | rig_DisposalGroupsIncludingDiscontinuedOperationsAmountOutstandingUnderWorkingCapitalLineOfCreditProvidedToBuyer
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fixed interest rate on borrowings under the working capital line of credit provided by the entity to buyer of discontinued non-strategic operations on completion of the sale transaction. + References No definition available. + Details
Name: | rig_DisposalGroupsIncludingDiscontinuedOperationsFixedInterestRateOnWorkingCapitalLineOfCreditToBuyer
Namespace Prefix: | rig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of working capital line of credit provided by the entity to buyer of discontinued non-strategic operations upon completion of the sale transaction. + References No definition available. + Details
Name: | rig_DisposalGroupsIncludingDiscontinuedOperationsWorkingCapitalLineOfCreditProvidedToBuyer
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the tax effect of gains (losses) included in earnings resulting from the sale or disposal of tangible assets, not including any gain (loss) recognized on the sale of oil and gas property or timber property. + References No definition available. + Details
Name: | rig_GainLossOnDispositionOfAssetsTaxEffect
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The gain (losses) from sale of assets including oil and gas properties per dilutive common stock during the reporting period. + References No definition available. + Details
Name: | rig_GainLossOnSaleOfAssetsPerDilutedShare
Namespace Prefix: | rig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of additional future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | rig_GuaranteeObligationsAdditionalMaximumExposure
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Represents the number of drilling units sold. + References No definition available. + Details
Name: | rig_NumberOfDrillingUnitsSold
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Standard Jackups operated during the period. Standard Jackups are all other jackups other than High-Specification Jackups. Jackups are self-elevating drilling platforms that have legs that can be lowered to the ocean floor to establish a foundation to support the drilling platform. These units are generally suited for water depths of 400 feet or less. + References No definition available. + Details
Name: | rig_NumberOfStandardJackupsOperating
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Other assets included in assets held for sale. + References No definition available. + Details
Name: | rig_OtherAssetsIncludedInAssetsHeldForSale
Namespace Prefix: | rig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for assets of a disposal group, including a component of the entity (discontinued operation), to be sold or that has been disposed of through sale, as of the financial statement date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
Name: | us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for current assets (assets with expected useful life shorter than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
Name: | us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e38679-109324 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of deferred revenue attributable to disposal group, expected to be recognized within one year or within the normal operating cycle if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of operating expenses attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For the disposal group, including a component of the entity (discontinued operation), carrying amount of assets not otherwise specified in the taxonomy that are expected to be realized or consumed within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition For the disposal group, including a component of the entity (discontinued operation), obligations not otherwise itemized that are due within one year or operating cycle, if longer, from the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
Name: | us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration