XML 79 R38.htm IDEA: XBRL DOCUMENT v2.4.1.9

Business (Details) (Continuing operations)	Mar. 31, 2015 item
Continuing operations
Number of mobile offshore drilling units	66rig_NumberOfMobileOffshoreDrillingUnits / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Number of High-Specification Floaters (in drilling units)	42rig_NumberOfHighSpecificationFloaters / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Number of Midwater Floaters (in drilling units)	14rig_NumberOfMidwaterFloaters / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Number of High-Specification Jackups (in drilling units)	10rig_NumberOfHighSpecificationJackups / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Number of Ultra-Deepwater drillships under construction (in drilling units)	7rig_NumberOfUltraDeepwaterDrillshipsUnderConstruction / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Number of High-Specification Jackup under construction (in drilling units)	5rig_NumberOfHighSpecificationJackupsUnderConstruction / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember

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 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