v2.4.0.8

Nature of Business (Details) (Continuing operations) | Jun. 30, 2014 drillingunit
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Continuing operations |
Number of mobile offshore drilling units | 77
Number of High-Specification Floaters (in drilling units) | 46
Number of Midwater Floaters (in drilling units) | 21
Number of High-Specification Jackups (in drilling units) | 10
Number of Ultra-Deepwater drillships under construction (in drilling units) | 9
Number of High-Specification Jackup under construction (in drilling units) | 5

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- 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

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- 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 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