v2.4.0.8

Nature of Business (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 Shelf Drilling Holdings, Ltd drillingunit | Dec. 31, 2013 Continuing operations drillingunit | Nov. 30, 2012 Discontinued operations drillingunit | Dec. 31, 2013 Discontinued operations Shelf Drilling Holdings, Ltd | Dec. 31, 2013 Discontinued operations Shelf Drilling Holdings, Ltd Minimum | Dec. 31, 2013 Discontinued operations Shelf Drilling Holdings, Ltd Maximum
Number of mobile offshore drilling units |  | 79 |  |  |  |
Number of High-Specification Floaters (in drilling units) |  | 46 |  |  |  |
Number of Midwater Floaters (in drilling units) |  | 22 |  |  |  |
Number of High-Specification Jackups (in drilling units) |  | 11 |  |  |  |
Number of Ultra-Deepwater drillships under construction (in drilling units) |  | 7 |  |  |  |
Number of High-Specification Jackup under construction (in drilling units) |  | 5 |  |  |  |
Number of Standard Jackups (in drilling units) | 7 |  |  |  |  |
Number of Standard Jackups sold (in drilling units) |  |  | 37 |  |  |
Number of swamp barge sold (in drilling units) |  |  | 1 |  |  |
Period for which Standard Jackups are agreed to be operated under operating agreements |  |  |  |  | 9 months | 27 months
Maximum period for which transition services to be provided following the completion of the sale transactions |  |  |  | 18 months |  |

X
- Definition Represents the maximum transition services offering period. + References No definition available. + Details
Name: | rig_MaximumExpectedTransitionServicesOfferingPeriod
Namespace Prefix: | rig_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of High-Specification Floaters, which includes Ultra-Deepwater, Deepwater and Harsh Environment semisubmersibles and drillships. High-Specification Floaters are specialized offshore drilling units with a water depth capacity of 4,500 feet or greater. + References No definition available. + Details
Name: | rig_NumberOfHighSpecificationFloaters
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of High-Specification Jackups. High-Specification Jackups are harsh environment and high-performance 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_NumberOfHighSpecificationJackups
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of High-Specification Jackups under construction. + References No definition available. + Details
Name: | rig_NumberOfHighSpecificationJackupsUnderConstruction
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Midwater Floaters. Midwater Floaters are non-high-specification semisubmersibles with a water depth capacity of less than 4,500 feet. + References No definition available. + Details
Name: | rig_NumberOfMidwaterFloaters
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of mobile offshore drilling units we own, had partial ownership interests in or operated at the measurement date. + References No definition available. + Details
Name: | rig_NumberOfMobileOffshoreDrillingUnits
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 The number of standard jackups sold during the reporting period. + References No definition available. + Details
Name: | rig_NumberOfStandardJackupsSold
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of swamp barge sold during the reporting period. + References No definition available. + Details
Name: | rig_NumberOfSwampBargeSold
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Ultra-Deepwater drillships under construction. + References No definition available. + Details
Name: | rig_NumberOfUltraDeepwaterDrillshipsUnderConstruction
Namespace Prefix: | rig_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the period for which the entity is required to operate the standard jackups under the terms of operating agreements. + References No definition available. + Details
Name: | rig_PeriodForWhichStandardJackupsAreToBeOperatedUnderOperatingAgreements
Namespace Prefix: | rig_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration